Gates Sees Plant-Based Meat Outcompeting Cattle on Cost and Emissions

Mark Rober

Replacing livestock with bio-engineered plant proteins bypasses an eight-to-one caloric conversion penalty, providing a technological path to eliminate agricultural emissions without demanding mass consumer sacrifice.

AI-assisted summary of Feeding Bill Gates a Fake Burger (to save the world) — original source. Check the original for full context.

Source published: 2020-02-12

Key ideas

Food tech companies Beyond Meat and Impossible Foods are engineering plant-based meat specifically for omnivores, with 96% of Impossible Foods customers identifying as meat eaters. (5:09)
Agriculture generates roughly 18% of global greenhouse emissions, with livestock contributing about half and producing more emissions than the entire global transportation sector combined. (9:54)
Cattle production operates at an inefficient 8:1 caloric conversion ratio, using eight calories of feed to yield just one calorie of meat while redirecting potential crops could feed an estimated 3.5 billion people. (11:29)
Bill Gates notes that while industrial sectors like steel and cement remain unresolved decarbonization challenges, food innovation offers a scalable path to reduce emissions without requiring absolute consumer sacrifice. (13:12)

Detailed notes

## Background Published on YouTube by Mark Rober on February 12, 2020, this video investigates whether modern plant-based meat alternatives can rival conventional beef and help curb climate change. In the accompanying description, Rober reflects on how the scientific method takes us to new frontiers while highlighting his educational venture CrunchLabs and charitable merchandise supporting NEXT for Autism.

## TL;DR Mark Rober, an avid meat eater, sets out to evaluate plant-based meat by analyzing its sensory authenticity, nutritional makeup, and environmental advantages. He tours the laboratories of Beyond Meat and Impossible Foods to examine how ingredients like yellow peas, plant oils, and soy-derived heme replicate the sizzle, chew, and iron-rich flavor of beef. After conducting successful blind taste tests with children, Rober cooks a plant-based tasting menu for Bill Gates in Gates's kitchen. Gates breaks down the heavy ecological toll of livestock farming—including emissions exceeding the entire global transport sector and vast deforestation in the Amazon—prompting Rober to advocate for pragmatic reductions rather than rigid, all-or-nothing veganism.

## Atmosphere & style The presentation carries Mark Rober's characteristic blend of energetic, curiosity-driven science communication, casual humor, and accessible investigative rigor. Dynamic scenes inside high-tech food laboratories and candid taste tests with blunt children give way to a surprisingly intimate, down-to-earth kitchen cooking session with Bill Gates. Gates brings measured, data-heavy authority to the discussion of climate realities, yet the overall mood remains buoyant, optimistic, and grounded by Rober's playful banter and pragmatic perspective on personal habits.

## Bulletin - [05:09](https://www.youtube.com/watch?v=-k-V3ESHcfA&t=309s) Food tech companies Beyond Meat and Impossible Foods are engineering plant-based meat specifically for omnivores, with 96% of Impossible Foods customers identifying as meat eaters. - [09:54](https://www.youtube.com/watch?v=-k-V3ESHcfA&t=594s) Agriculture generates roughly 18% of global greenhouse emissions, with livestock contributing about half and producing more emissions than the entire global transportation sector combined. - [11:29](https://www.youtube.com/watch?v=-k-V3ESHcfA&t=689s) Cattle production operates at an inefficient 8:1 caloric conversion ratio, using eight calories of feed to yield just one calorie of meat while redirecting potential crops could feed an estimated 3.5 billion people. - [13:12](https://www.youtube.com/watch?v=-k-V3ESHcfA&t=792s) Bill Gates notes that while industrial sectors like steel and cement remain unresolved decarbonization challenges, food innovation offers a scalable path to reduce emissions without requiring absolute consumer sacrifice.

## Key takeaways - [00:00](https://www.youtube.com/watch?v=-k-V3ESHcfA&t=0s) Modern plant-based meat companies design their products to match the sensory profile, fat sizzle, mouthfeel, and protein density of real meat to target omnivores rather than traditional vegans. - [03:09](https://www.youtube.com/watch?v=-k-V3ESHcfA&t=189s) Beyond Meat formulates its patties using yellow pea protein, potato starch, and coconut and sunflower oils to mimic beef sizzle and fat rendering without containing dietary cholesterol. - [05:09](https://www.youtube.com/watch?v=-k-V3ESHcfA&t=309s) Impossible Foods utilizes plant-derived heme (leghemoglobin) from soy root nodules to replicate the distinct iron-rich, metallic flavor of animal meat. - [05:09](https://www.youtube.com/watch?v=-k-V3ESHcfA&t=309s) Elite athletes adopt plant-based diets to reduce inflammatory markers by up to 30% within three weeks, challenging the cultural marketing trope that athletic performance requires animal meat. - [05:09](https://www.youtube.com/watch?v=-k-V3ESHcfA&t=309s) Blind taste tests with children confirm that modern plant-based burgers pass as authentic animal beef even among notoriously blunt critics. - [09:54](https://www.youtube.com/watch?v=-k-V3ESHcfA&t=594s) Agriculture accounts for roughly 18% of global greenhouse emissions, with livestock driving roughly half of that total through a combination of cattle burps and farts. - [09:54](https://www.youtube.com/watch?v=-k-V3ESHcfA&t=594s) The livestock sector emits more greenhouse gases globally than all cars, trucks, trains, ships, and airplanes combined. - [09:54](https://www.youtube.com/watch?v=-k-V3ESHcfA&t=594s) Cattle serve as an inefficient caloric intermediary, requiring eight calories of input for every single calorie of beef produced due to animal respiration and bone structure. - [09:54](https://www.youtube.com/watch?v=-k-V3ESHcfA&t=594s) Meat accounts for only about 10% of global daily caloric intake despite livestock grazing and feed production occupying the vast majority of agricultural land. - [11:29](https://www.youtube.com/watch?v=-k-V3ESHcfA&t=689s) The freshwater required to produce 24 beef patties could instead yield 75 loaves of bread and 30 jars of peanut butter, enough to feed an individual for over a year instead of a week. - [11:29](https://www.youtube.com/watch?v=-k-V3ESHcfA&t=689s) Over 20% of the Amazon rainforest has been cleared primarily for cattle ranching, eliminating critical carbon sinks while driving up livestock emissions. - [13:12](https://www.youtube.com/watch?v=-k-V3ESHcfA&t=792s) Bill Gates argues that combating climate change requires technological innovation and price parity, as relying solely on widespread consumer sacrifice will fail to hold warming under two degrees. - [13:12](https://www.youtube.com/watch?v=-k-V3ESHcfA&t=792s) Progress in plant-based food innovation has shifted the focus of toughest zero-carbon climate challenges toward stubborn industrial sectors like steel and cement. - [13:12](https://www.youtube.com/watch?v=-k-V3ESHcfA&t=792s) Mark Rober advocates for a pragmatic, non-binary approach to diet, demonstrating that cutting personal meat consumption by 50% or adopting practices like Meatless Monday provides substantial environmental benefits.

## Detailed walkthrough ### [00:00](https://www.youtube.com/watch?v=-k-V3ESHcfA&t=0s) The Three Questions of Plant-Based Meat

Mark Rober opens with an unexpected scene: standing beside the richest man in the world, Bill Gates, holding a burger he just cooked for him. The twist is that the patty is made entirely from plants, meaning it can safely be eaten raw. Rober explains that every year, he dedicates one of his twelve videos to highlighting people who use science and technology to make the world better. Two years prior, he highlighted a paper centrifuge and microscope capable of diagnosing malaria for 51 cents rather than the standard $10,000 lab equipment; the previous year featured a clarifying powder that turns mud-contaminated water into drinkable water for developing nations. That was also his first meeting with Bill Gates, who earned Rober's lasting respect by happily devouring a plate of microwaved pizza rolls. Now, Rober turns his attention to modern plant-based meat, which claims to replicate the appearance and taste of real meat using only vegetation.

Rober begins with a personal confession: he is an avid meat eater who has consumed meat with almost every meal since childhood, citing barbecue as his absolute favorite food genre. Yet, as someone committed to the scientific method, he wants to investigate the reality of plant-based meats by answering three fundamental questions: 1. **Taste and Sensory Experience:** How does it taste, smell, look, and feel, and does it successfully convince the brain that it is real meat? 2. **Health and Nutritional Value:** What is actually inside it? Is it an artificial concoction of lab chemicals, and how does its protein profile stack up against conventional beef? 3. **Environmental Impact:** Is switching to plant-based meat merely a modest improvement for the planet, or is it dramatically better?

Beyond the data, Rober touches on an ethical dilemma that troubles many meat eaters: the reality of industrial factory farming. He notes that cows often live without ever encountering a blade of grass, and pigs—widely considered more intelligent than dogs—frequently spend their entire lives confined to crowded concrete pens. “These factories are efficient. They're optimized for driving down costs, not for animal well-being.” While he acknowledges avoiding these thoughts while picking up In-N-Out or Chick-fil-A, he feels traditional veggie burgers never provided a satisfying substitute. Recently, however, food technology companies shifted strategies to target omnivores directly, engineering products that match the sensory profile of animal meat so consumers can attend a summer barbecue without having to settle for a bowl of quinoa salad. Rober fires up an outdoor grill with a plant-based patty, noting the authentic sizzling audio, the dripping fat igniting flare-ups, the aroma, and the mouthfeel when licking the spatula. Satisfied that it acts like beef on the grill, he sets off to visit the industry leaders to see what is actually inside the product.

```mermaid flowchart TD accTitle: The Three Core Plant-Based Meat Inquiries accDescr: Diagram illustrating Mark Rober's three investigative questions regarding plant-based meat alternatives.

subgraph Evaluation["Plant-Based Meat Investigation"] Q1["1. Sensory Experience Taste, texture, smell, sizzle"] Q2["2. Nutrition & Ingredients Lab chemicals vs. plant proteins"] Q3["3. Environmental Footprint Marginal vs. dramatic planetary gains"] end

Rober["Mark Rober's Investigation"] --> Evaluation ```

[03:09](https://www.youtube.com/watch?v=-k-V3ESHcfA&t=189s) Inside Beyond Meat: Yellow Peas, Saturated Fat, and the Sausage Test

To discover what goes into the food before tasting it fully, Rober visits the headquarters of Beyond Meat. Walking through the facility feels distinctly like the laboratory tour scene in *Jurassic Park*, prompting him to joke with staff about whether the personnel in lab coats are actors or legitimate scientists. Beyond Meat's team explains that their research divisions do not study flavor in isolation; dedicated teams analyze everything from the structural bite and color to the aroma, the specific frequency of the grilling sizzle, and matching the exact caloric and protein density of traditional beef burgers to remove any consumer hesitation.

Rober inspects a raw ingredient platter detailing the burger's construction: - **Color:** Plant extracts that emulate the hue of raw and cooked ground beef. - **Fat & Sizzle:** Coconut oil and sunflower oil, which melt and render during cooking to create authentic grill flame flare-ups. - **Carbohydrates:** Potato starch. - **Protein:** Sourced primarily from yellow peas.

On health metrics, these patties contain zero dietary cholesterol because they are made from plants. However, because they utilize coconut oil for juiciness, they still contain saturated fat; Rober cautions that nobody should mistake them for a pristine, dressing-free garden salad.

Rober then steps into the kitchen with Beyond Meat's Chef Chris. Explaining that he has intentionally kept his palate untouched by plant-based substitutes so his initial reaction would be genuine—and mentioning his impending cooking date for Bill Gates—he asks the chef for crash-course culinary pointers. They prepare a plant-based Italian sausage link on the grill. Rober takes a bite, completely taken aback by the interior juiciness and chew, concluding: “There's no way I would've guessed I wasn't actually eating real meat.” Following the sausage, they cook a Beyond Burger, and Rober finds that once it is assembled between buns with standard burger toppings, it is practically indistinguishable from an animal-based hamburger.

[05:09](https://www.youtube.com/watch?v=-k-V3ESHcfA&t=309s) Inside Impossible Foods: Heme, Protein Myths, and Kid Taste Tests

Rober travels next to the facilities of Impossible Foods, where staff invite him to assemble an Impossible Burger patty by hand using five ingredient bowls: 1. Rehydrated soy protein concentrate 2. Potato protein 3. Heme (leghemoglobin) 4. A plant-cellulose culinary binder to give structural cohesion 5. Coconut and sunflower oils

The standout ingredient is heme, an iron-rich molecule found in blood hemoglobin as well as root nodules of soy plants. The Impossible team points out that heme is the exact biological compound responsible for giving meat its unmistakable metallic, savory flavor. Folding and blending the five ingredients together by hand like pastry dough, Rober transforms the loose components into a raw patty that handles like conventional ground beef. A representative points out that an overwhelming 96% of the people buying their products are self-identified meat eaters, demonstrating that the consumer target is not traditional vegans, but rather mainstream consumers seeking an identical eating experience without the livestock footprint.

The discussion highlights how food marketing has spent decades pairing meat consumption with traditional masculinity under the guise that real men require animal protein. Rober debunks this premise, observing that the average meat eater already acquires roughly 50% of their daily protein from plant sources like beans, peas, nuts, and grains such as corn, rice, and oats. Furthermore, elite athletes—including Arnold Schwarzenegger, Kyrie Irving, Lewis Hamilton, Serena and Venus Williams, and Nate Diaz—have transitioned to plant-based diets, pointing to research showing that plant-based eating can lower systemic inflammatory markers by nearly 30% in three weeks, accelerating post-workout recovery. Rober remarks that if it works for top athletes, it is more than adequate for his weekly recreational soccer games.

After sampling an Impossible Burger prepared in the kitchen, Rober seeks a broader consensus before serving Bill Gates. He invites friends and their children to a local restaurant serving Impossible Burgers. Noting that adults might soften their feedback out of courtesy, Rober focuses on the children, who are notoriously blunt critics. The kids thoroughly enjoy the juicy burgers, unaware of the swap. When Rober reveals the patties contain zero animal meat, the kids are incredulous, with one exclaiming, “Wait, what? You're lying,” before double-checking whether they just ate vegetables disguised as meat. With his culinary practice complete and the taste tests verified, Rober arrives back at Bill Gates's kitchen to cook for him and tackle the third question: the environmental equation.

- **Inflammation reduction:** Studies reveal a plant-based diet can lower indicators of inflammation by nearly 30% in three weeks. - **Consumer demographic:** 96% of customers purchasing Impossible Foods products identify as regular meat eaters. - **Heme origin:** Extracted from soy plants rather than animal blood, replicating the distinctive metallic, savory flavor profile of meat.

[08:29](https://www.youtube.com/watch?v=-k-V3ESHcfA&t=509s) Burger Tasting with Bill Gates

With Bill Gates arriving in an hour, Mark Rober heads out to get groceries and takes over Gates’s kitchen to cook up a plant-based tasting. As a control burger and palate cleanser, Rober brings in a traditional burger from Dick's Drive-In, knowing Gates is a loyal fan of the Seattle chain. Taking a bite, Rober remarks as a non-Seattle native that Dick's might be an acquired taste, to which Gates smiles and replies, “Yeah, you get used to a certain burger.”

```mermaid flowchart LR accTitle: Tasting Progression accDescr: Three-step tasting comparing real beef with modern plant-based meat alternatives. A["Dick's Drive-In Burger (Beef Control)"] --> B["Plant-Based Burger Patty (Home Cooked)"] B --> C["Plant-Based Bratwurst (Next Test)"] ```

Rober then serves Gates his freshly prepared plant-based burger. Impressed by how far meat alternatives have come compared to dry veggie patties of the past, Gates observes, “If the plant-based guys are not done innovating, eventually, they claim you won't be able to tell the difference.” After Gates samples a cooked plant-based bratwurst and deems it “pretty good,” Rober pivots from taste and texture to the environmental reality of meat production.

- Dick's Drive-In burgers serve as the real-meat baseline for the taste test. - Gates notes that modern meat alternatives are “light-years away from what they used to make” compared to early-generation veggie burgers.

---

[09:54](https://www.youtube.com/watch?v=-k-V3ESHcfA&t=594s) Livestock Emissions and the Inefficient Middleman

When Rober brings up the environmental impact of animal farming, Gates lays out the hard numbers behind agricultural emissions: agriculture makes up roughly 18% of all global greenhouse emissions, and livestock accounts for roughly half of that 18%, with beef driving the vast majority. In response to Rober’s humorous check on whether the culprit is cow burps or cow farts, Gates notes there are “slightly more burps than farts, but it's a mix of those two.” The livestock sector alone emits more greenhouse gases than all cars, trucks, trains, ships, and airplanes on Earth combined.

```mermaid flowchart TD accTitle: Trophic Energy Inefficiency accDescr: Comparing direct solar energy consumption via plants to indirect consumption through cattle. subgraph SunSource["Primary Energy"] S["Solar Energy"] --> P["Crops / Plants"] end subgraph Pathways["Consumption Pathways"] P -->|"Direct (Efficient)"| H1["Humans"] P -->|"8 Calories In"| C["Cattle Respiration & Bone"] C -->|"1 Calorie Out (Inefficient)"| H2["Meat for Humans"] end ```

Beyond emissions, cattle are extraordinarily inefficient caloric converters. Gates points out that beef operates at an eight-to-one ratio: “You use eight calories to feed that cow for every calorie of meat you get out of it because you're building bone and respiration for that cow.” Humans essentially run on solar energy absorbed by plants; introducing livestock turns the animal into an energy-wasting middleman. Meat provides only about 10% of our daily caloric intake, yet raising livestock and growing feed consumes massive swathes of land compared to the small fraction used to grow crops eaten directly by humans.

- The agricultural sector drives roughly 18% of global emissions; livestock makes up about half (~9%), predominantly from beef. - Livestock produces more greenhouse gases than the entire global transportation sector combined. - Beef has an 8:1 caloric conversion penalty due to animal metabolism and skeletal growth. - Meat provides only 10% of average daily calories, but consumes the vast majority of agricultural land.

---

[11:29](https://www.youtube.com/watch?v=-k-V3ESHcfA&t=689s) Resource Ratios and the Amazon Threat

The resource discrepancy is equally extreme when looking at freshwater consumption. Producing a single batch of 24 beef hamburger patties requires an entire swimming pool of water. That identical volume of water could instead produce 75 loaves of whole grain bread and 30 jars of peanut butter. Eating two peanut butter sandwiches a day—providing nearly identical calories and protein to two burger patties—would allow that water resource to feed a person for over a year, compared to a little over a week on beef. Shifting crops directly to human consumption could feed an estimated 3.5 billion additional people worldwide.

```mermaid flowchart LR accTitle: Water Resource Equivalence accDescr: Visualizing the caloric lifespan of one swimming pool of water used for beef versus peanut butter sandwiches. W["One Swimming Pool of Water"] --> B["24 Beef Patties (Lasts ~1 Week)"] W --> PB["75 Loaves of Bread + 30 Jars of Peanut Butter (Lasts Over 1 Year)"] ```

The issue is accelerating because meat consumption rises in tandem with economic prosperity: “Particularly as people get richer, they tend to eat more meat,” Gates explains. What was once an occasional luxury has become a mass commodity. In the Amazon basin, ranchers intentionally burn down rainforests to create grazing pastures. Over 20% of the Amazon rainforest has been irreversibly destroyed, dealing a double blow: creating more cattle emissions while simultaneously releasing huge amounts of stored carbon back into the atmosphere as carbon dioxide.

- The water needed for 24 beef patties can yield 75 loaves of whole grain bread and 30 jars of peanut butter. - Identical water and nutrient inputs sustain a person for over a year on peanut butter sandwiches versus just over a week on beef patties. - Redirecting animal feed crops directly to people could feed an extra 3.5 billion humans. - Over 20% of the Amazon rainforest has been cleared, largely for cattle grazing.

---

[13:12](https://www.youtube.com/watch?v=-k-V3ESHcfA&t=792s) Innovation, Equity, and Practical Pragmatism

Gates stresses that the front-line victims of unchecked climate change are equatorial subsistence farmers facing catastrophic droughts, floods, and heatwaves. Relying entirely on lifestyle sacrifice will not solve the crisis: “If you're just trying to get people to cut back, don't eat meat, don't drive to work, don't take trips, it's such a dramatic set of sacrifices that everybody has to engage in that, without innovation, we're probably gonna go way past the two degrees.” Plant-based meat offers a technological way out. As scale increases, plant-based alternatives can undercut animal meat on price, providing identical flavor while using half the cost, vastly fewer resources, and zero factory farming.

Rober reflects on his own takeaway from the investigation. Rather than adopting an all-or-nothing vegan identity, he cut his personal meat intake by more than half, abandoning the assumption that every proper meal requires animal protein. Plant-based alternatives are widely accessible in supermarkets and fast-food chains like Burger King and Carl's Jr., and even modest collective shifts like “Meatless Monday” make a measurable difference:

> “And remember, it doesn't have to be binary, like you either eat no meat or you're frickin' Ron Swanson.”

```mermaid flowchart TD accTitle: Hardest Climate Challenges accDescr: Gates's assessment of tough climate sectors, noting plant-based progress versus stubborn industrial materials. A["Toughest Climate Problems"] --> B["Livestock / Agriculture (Plausible path via plant-based innovation)"] A --> C["Steel Production (Still scratching head)"] A --> D["Cement Production (Still scratching head)"] ```

Gates reflects that livestock used to seem like the single most insurmountable climate challenge, but thanks to emerging food-science companies, industrial sectors like steel and cement have taken its place as the toughest unsolved puzzles. To close out the visit, Rober jokingly presents Gates with a celebratory plate of frozen pizza rolls before quickly pulling them away, prompting Gates to laugh: “You tricked me, Mark Rober!”

- Bill Gates highlights steel and cement as the two hardest remaining zero-carbon challenges. - Plant-based burger options have spread across thousands of fast-food outlets, including Burger King and Carl's Jr. - Rober reduced his household meat consumption by over 50% without adopting strict veganism.

## Notable quotes > [13:12](https://www.youtube.com/watch?v=-k-V3ESHcfA&t=792s) And remember, it doesn't have to be binary, like you either eat no meat or you're frickin' Ron Swanson. — Mark Rober

> [09:54](https://www.youtube.com/watch?v=-k-V3ESHcfA&t=594s) You use eight calories to feed that cow for every calorie of meat you get out of it because you're building bone and respiration for that cow. — Bill Gates

## Mentioned Mark Rober, Bill Gates, Beyond Meat, Impossible Foods, Chef Chris, Dick's Drive-In, In-N-Out, Chick-fil-A, Burger King, Carl's Jr., CrunchLabs, NEXT for Autism, Arnold Schwarzenegger, Kyrie Irving, Lewis Hamilton, Serena Williams, Venus Williams, Nate Diaz, Ron Swanson, Jurassic Park, Amazon rainforest

## Video description Sometimes the scientific method takes us to new frontiers.

I started a company called CrunchLabs where we build a toy together and then I teach you all the juicy physics for how it works. So if you want to learn to think like an engineer and have really fun time doing it, check out the current promotion where you get 2 FREE boxes at https://crunchlabs.com

You should also go subscribe to the CrunchLabs YouTube channel cause we’ve got some bangers in the pipeline- https://www.youtube.com/crunchlabs

Thanks to these folks for providing some of the music in the video:

Ponder - https://youtube.com/@Pondermusic Laura Shigihara - @supershigi Andrew Applepie - https://soundcloud.com/andrewapplepie Blue Wednesday - https://soundcloud.com/bluewednesday

MERCH (all proceeds go to NEXT for Autism): They are soft- https://teespring.com/stores/markrober

[Source](https://www.youtube.com/watch?v=-k-V3ESHcfA)

中文简报

盖茨认为植物肉在成本与碳排放上将超越传统畜牧肉类用生物工程植物蛋白替代牲畜，可以绕过8:1的热量转化损失，提供了一条无需大众消费者做出牺牲即可消除农业排放的技术路径。肉食爱好者马克·罗伯（Mark Rober）着手从感官真实度、营养成分和环境优势三个方面对植物肉进行评估。他参观了Beyond Meat和Impossible Foods的实验室，了解黄豌豆、植物油和大豆提取血红素等成分是如何复刻牛肉滋滋作响的煎烤效果、咀嚼感以及富含铁质的风味。在对儿童成功进行盲测后，罗伯在比尔·盖茨的厨房里为他烹制了一套植物肉品鉴菜单。盖茨详细剖析了畜牧业沉重的生态代价——包括其排放量超过了全球整个交通运输部门的总和，以及导致亚马逊地区大面积森林被砍伐——这促使罗伯倡导采取务实的适度减量策略，而非强求非此即彼的严苛纯素食主义。食品科技公司Beyond Meat和Impossible Foods正专门针对杂食人群研发植物肉，Impossible Foods有96%的客户自认为肉食者。 (5:09) 农业约占全球温室气体排放量的18%，其中畜牧业贡献了约一半，其产生的排放量超过了全球整个交通运输部门的总和。 (9:54) 肉牛养殖的热量转化率效率极低，仅为8:1，即消耗8卡路里的饲料才能产出1卡路里的肉；如果将这些潜在作物重新分配，估计可养活35亿人。 (11:29) 比尔·盖茨指出，尽管钢铁和水泥等工业部门仍面临尚未解决的脱碳挑战，但食品创新提供了一条无需消费者做出绝对牺牲即可减少排放的可扩展路径。 (13:12)

Reading summary

Mark Rober investigates the sensory engineering and environmental economics of modern plant-based meat, concluding alongside Bill Gates that food-science innovation provides a viable alternative to the extreme resource inefficiencies of industrial livestock production. Sensory Engineering and Nutritional Composition (3:09) Modern plant-based food companies have shifted their focus from niche vegetarian substitutes to directly engineering products for mainstream meat eaters, who make up 96% of Impossible Foods' customer base. To replicate the sensory profile of animal meat, Beyond Meat and Impossible Foods deconstruct its physical properties: proteins are harvested from yellow peas and soy concentrates, potato starches and plant cellulose provide structural binding, and coconut and sunflower oils mimic the melting fat and sizzling audio of a conventional grill. A key breakthrough highlighted by Impossible Foods is plant-derived heme—an iron-carrying molecule sourced from soy roots—which provides the metallic, savory flavor characteristic of animal blood. While these plant patties eliminate dietary cholesterol, Rober cautions that their coconut oil content retains saturated fat, meaning they should not be viewed as low-calorie health foods. However, in double-blind and casual trials with children and Bill Gates, cooked samples were consistently received as indistinguishable from or comparable to real beef patties and sausages. Caloric Inefficiency and Environmental Resource Costs (9:54) Examining agricultural data, Gates notes that farming generates roughly 18% of global greenhouse emissions, with livestock accounting for about half of that total (approximately 9%)—out-emitting the entire global transportation sector combined. Cattle act as an inefficient caloric intermediary, requiring eight calories of plant feed to generate a single calorie of edible beef due to the energy expended on animal respiration, bones, and metabolism. While meat accounts for only 10% of global daily calorie intake, livestock and feed crops dominate the vast majority of agricultural land. Water and land footprints show similar disparities. Producing 24 beef patties consumes an entire swimming pool of water—a volume that could instead yield 75 loaves of bread and 30 jars of peanut butter, which could sustain an individual for over a year instead of a week. Gates notes that rising global wealth drives higher meat demand, which has accelerated cattle-driven deforestation across more than 20% of the Amazon rainforest, simultaneously releasing stored carbon and reducing planetary absorption capacity. Technological Innovation Versus Total Lifestyle Sacrifice (13:12) Gates stresses that solving climate change cannot rely purely on universal personal sacrifice, such as mandating that populations immediately stop traveling or eliminate meat. Subsistence farmers in equatorial regions suffer the earliest impacts of climate disruption, making technological alternatives that compete on flavor and price necessary to prevent warming beyond two degrees. As manufacturing scales, plant-based meats possess the potential to undercut animal meat on production costs. Rather than framing consumer choice as a strict binary between absolute veganism and heavy meat consumption, Rober advocates for incremental reductions. Pointing to fast-food availability and initiatives like Meatless Monday, Rober personally halved his household meat intake, emphasizing that widespread partial substitution produces substantial environmental relief. Gates observes that while livestock agriculture once seemed like an insurmountable decarbonization challenge, rapid advancements in food science have mapped out a plausible market solution, leaving industrial manufacturing—particularly steel and cement production—as the most intractable climate puzzles.

精炼阅读摘要

科普创作者Mark Rober通过走访植物肉研发企业并与Bill Gates共同品鉴，探讨了现代植物基肉类在感官体验、营养成分和环境减排方面的现实表现。Gates指出，农业与畜牧业占全球温室气体排放的近两成，仅凭道德倡导要求公众牺牲生活方式难以逆转气候变暖，依靠食品科技创新推动肉类替代才是更具可行性的路径。从靶向素食到对标肉食：食品科技的感官还原 (3:09) 传统素食肉饼长期以来因质感干燥而无法吸引主流杂食人群，而新一代食品科技公司则将研发重点转向完整复刻真肉的咀嚼感、香气与烹饪反应。Rober实地走访Beyond Meat与Impossible Foods后指出，企业并不单独孤立研究风味，而是针对煎烤时的滋滋声频率、油脂融化滴落引发的明火、热量及蛋白质密度展开系统工程匹配。例如，Beyond Meat采用黄豌豆蛋白提供组织咬劲，利用椰子油与向日葵油模拟动物脂肪，并辅以马铃薯淀粉和植物色素还原生熟肉质色泽；Impossible Foods则提炼源自大豆植物根瘤的血红素（heme），以模拟真肉中特有的金属鲜味化合物。在盲测与现场制作中，Rober发现这些植物肉饼在夹入汉堡面包并搭配常规酱料后，口感与质地几乎难辨真假；即便是对口味挑剔、直言不讳的儿童群体，在品尝Impossible Burger后也误以为自己在吃真正的牛肉汉堡。Impossible Foods提供的数据表明，其购买者中有96%是自认为肉食者的主流消费者，这印证了植物替代品正走出纯素食圈层，以感官平替直接切入传统肉类市场。成分解析与营养反思：去胆固醇但非完全无脂 (5:09) 在健康与营养层面，植物肉消除了传统红肉的膳食胆固醇，但并不能等同于无油低卡的清淡蔬菜沙拉。Rober在拆解配方时提醒，为了保持肉饼在煎烤过程中的多汁感与油脂香气，生产方普遍添加了椰子油等成分，导致成品依然含有一定量的饱和脂肪。因此，消费者不应将其简单视作绝对健康的减脂代餐，而应视作对传统加工红肉的等热量替换品。针对长期以来认为“纯肉饮食才符合力量与男性气质”的营销话术，Rober援引数据进行了纠偏。普通肉食者日常约有50%的蛋白质其实早已直接来自豆类、坚果及谷物等植物源。包括Arnold Schwarzenegger、Lewis Hamilton以及Serena Williams在内的顶级运动员已转向植物基饮食；相关研究显示，植物基饮食能在三周内将人体系统性炎症指标降低近30%，从而加快高强度运动后的恢复。这表明在满足人体蛋白质和运动机能需求方面，科学配比的植物来源完全足以替代动物蛋白。畜牧业的资源损耗：热量转换中低效的中间环节 (9:54) 在与Bill Gates的对谈中，讨论核心转向了肉类生产背后的生态代价格。Gates给出的数据显示，全球农业约占温室气体总排放的18%，其中畜牧业贡献了约一半（约9%），且绝大部分来自肉牛养殖（包括牛反刍产生的呃逆与排气）。目前全球畜牧业单项造成的温室气体排放，已经超过了全球所有汽车、卡车、火车、轮船与飞机的交通排放总和。除了气体排放，牛在能量转化链条上属于效率极低的中间载体。Gates解释称，牛肉的卡路里转化比高达8:1，即牛每摄入8卡路里的饲料，仅能产出1卡路里的肉制品，其余7卡路里都在骨骼构建和日常呼吸代谢中损耗。人类生存所依赖的能量本质上来源于植物吸收的太阳能，将饲料喂养给牲畜再食用，浪费了绝大部分初级能量。肉类仅占人类日常平均热量摄入的10%左右，却霸占了绝大多数农业用地与饲料耕地，造成了土地资源的极度低效分配。水资源危机与毁林压力：重新配置粮食供应的潜力 (11:29) 畜牧业对淡水资源的消耗同样呈现悬殊差距。生产制作24块牛肉汉堡饼所需的淡水用量，相当于整整一个标准游泳池的水体容积。同样这一池水，若用于种植农作物，可生产75条全麦面包和30罐花生酱。以每天食用两个花生酱三明治（所含热量和蛋白质与两块牛肉饼相当）计算，该水资源储备足以维持一个人一年以上的口粮，而换算成牛肉饼仅能维持刚过一周。如果将目前种植牲畜饲料的耕地与资源直接转向人类食用作物，理论上可额外养活全球35亿人口。更严峻的挑战在于，全球人均肉类消费量随着经济水平提升而同步攀升。为了开辟新的放牧草场，南美牧场主大面积砍伐和焚烧热带雨林，目前已有超过20%的亚马逊雨林遭到不可逆的砍伐破坏。这一过程带来了双重环境打击：一方面因新增牛群而增加甲烷等温室气体排放，另一方面因植被烧毁而将原本储存在雨林深处的巨量碳素重新释放回大气层。气候突破依靠技术创新，公众行动拥抱实用主义 (13:12) 面对失控的气候危机，受害最深的往往是赤道地区依靠微薄农业度日的农民。Gates强调，单靠呼吁大众压抑欲望、减少出行或彻底戒肉等道德说教式牺牲，根本无法让全球升温控制在2摄氏度以内；唯有通过食品工程的规模化创新，使植物肉在口味一致的同时实现更低成本，才能实现市场化自发替代。Gates坦言，以往畜牧业曾被视为最棘手的气候死结，但如今植物肉技术已展示出破局路径，相比之下，钢铁与水泥工业的脱碳反而成了当前更难解决的技术难题。针对普通公众的参与方式，Rober主张采取非二元对立的温和实用主义。消费者无需在“严格纯素食主义者”与“极端肉食拥趸”之间做非黑即白的抉择。植物基食品已经在Burger King、Carl's Jr.等大型连锁餐饮和常规超市普及，公众仅需尝试“无肉星期一”或将日常肉类摄入减少一半，聚沙成塔的转变就足以对缓解全球农业资源压力产生切实影响。本节目论证了现代植物肉在仿真度与营养替代上的可行性，并指出降低畜牧业比重对减缓气候变暖与保护淡水资源至关重要。不过，节目探讨主要侧重于技术验证与消费体验，植物肉能否在成本控制、大规模供应链铺设以及全球多饮食文化中全面取代传统牛肉，仍取决于未来的工艺降本与长久的市场接纳度。

Detailed notes — zh

## Background 该视频由知名科普博主 Mark Rober 于 2020 年 2 月 12 日发布在 YouTube 频道。视频简介指出科学方法有时能带我们探索全新前沿，并宣传了作者创办的工程教育玩具公司 CrunchLabs 以及相关促销活动。 ## TL;DR 作为一名狂热的肉食爱好者，Mark Rober 针对新一代植物人造肉展开了科学调查，重点探究其口感质地、健康营养以及对环境的实际影响。他深入 Beyond Meat 和 Impossible Foods 的研发实验室，揭示了植物肉利用豌豆蛋白、植物油与大豆血红素还原真肉风味的工艺，并在餐厅对儿童进行了盲测验证。随后，Mark 带着自制的植物汉堡与德式小香肠拜访比尔·盖茨（Bill Gates），两人一边品尝一边深入探讨了传统畜牧业低效的能量转化率、高昂的水土消耗与温室气体排放，呼吁大众不必走向极端纯素，而是通过每周减量或尝试植物替代品来共同推动气候改善。 ## Atmosphere & style 整部视频洋溢着极客式的幽默与严谨的科学探索精神，节奏轻快且充满感染力。从实验室充满好奇的解构、儿童盲测时的童趣互动，再到盖茨私人厨房中两位顶尖科技头脑的真诚对谈，氛围在轻松风趣与严肃深刻之间流畅切换。观众既能感受到工程实验带来的感官震撼，也能体会到面对全球气候危机时兼具理性与同理心的务实希望。 ## Bulletin - [02:35](https://www.youtube.com/watch?v=-k-V3ESHcfA&t=155s) 植物人造肉研发已突破传统素肉的技术局限，利用甜菜色素、椰子油、黄豌豆蛋白以及大豆提取的血红素（heme），实现了在色泽、气味、质地乃至煎烤滋滋声上高度逼近真实牛肉的体验。 - [09:54](https://www.youtube.com/watch?v=-k-V3ESHcfA&t=594s) 全球农业部门碳排放占总量的约 18%，其中畜牧业占去近半且绝大部分来自牛肉养殖；从能量转化来看，生产 1 卡路里牛肉需要消耗约 8 卡路里饲料，存在极高的能量浪费与碳排放。 - [13:12](https://www.youtube.com/watch?v=-k-V3ESHcfA&t=792s) 比尔·盖茨指出，仅靠要求公众做道德牺牲难以将全球升温控制在 2 摄氏度以内；植物肉等技术创新使畜牧业脱碳看到曙光，而钢铁和水泥行业已成为目前气候治理中最棘手的难题。 - [13:12](https://www.youtube.com/watch?v=-k-V3ESHcfA&t=792s) 应对气候危机无需走向完全纯素的极端，大众通过推行“无肉星期一”或将肉类摄入减半等务实减量方式，即可在宏观上产生巨大的减排与资源节约聚合效应。 ## Key takeaways - [00:00](https://www.youtube.com/watch?v=-k-V3ESHcfA&t=0s) 新一代植物人造肉改变了策略，不再专门服务于素食者，而是针对传统肉食爱好者开发具有同等口感与烹饪体验的无妥协替代品。 - [00:00](https://www.youtube.com/watch?v=-k-V3ESHcfA&t=0s) 传统工厂化养殖对牛和猪等动物的福利漠不关心，催生了人们通过食品科技探索更人道食物生产路径的需求。 - [02:35](https://www.youtube.com/watch?v=-k-V3ESHcfA&t=155s) Beyond Meat 通过搭配黄豌豆蛋白、椰子油与葵花籽油、马铃薯淀粉及甜菜色素，模拟出牛肉的蛋白质、脂肪滴落感与烤制效果。 - [05:09](https://www.youtube.com/watch?v=-k-V3ESHcfA&t=309s) 血红素（heme）是肉类独特风味的核心来源，Impossible Foods 通过植物提取与发酵技术获取该分子，使得 96% 的购买者均为传统肉食者。 - [05:09](https://www.youtube.com/watch?v=-k-V3ESHcfA&t=309s) 虽然流行文化常将吃肉与力量挂钩，但科学研究证实植物性饮食可显著降低人体炎症指标并加速高强度训练后的肌肉恢复。 - [08:29](https://www.youtube.com/watch?v=-k-V3ESHcfA&t=509s) 在面向儿童与比尔·盖茨的盲测及品尝中，植物肉展现出媲美传统牛肉汉堡与香肠的质感，证明其逼真度已远超过去的素肉饼。 - [09:54](https://www.youtube.com/watch?v=-k-V3ESHcfA&t=594s) 畜牧业产生的温室气体排放量超过了全球所有交通工具的总和，且牛打嗝排放的甲烷是其中的重要污染源。 - [09:54](https://www.youtube.com/watch?v=-k-V3ESHcfA&t=594s) 以牛为中间商转化热量的效率极低（投入产出比约 8:1），且全美绝大部分农业土地被用于放牧和饲料种植，而非直接供给人类食用。 - [11:29](https://www.youtube.com/watch?v=-k-V3ESHcfA&t=689s) 生产 24 块牛肉饼所需的水资源足以制作能吃上一整年的花生酱三明治；直接食用牲畜消耗的粮食理论上可额外养活全球 35 亿人口。 - [11:29](https://www.youtube.com/watch?v=-k-V3ESHcfA&t=689s) 伴随全球经济增长与肉类消费暴增，南美为开辟牧场已焚毁 20% 的亚马逊雨林，造成甲烷激增与碳汇破坏的双重气候打击。 - [13:12](https://www.youtube.com/watch?v=-k-V3ESHcfA&t=792s) 气候变化对赤道附近的贫困人群冲击最为致命，依靠要求大众牺牲生活质量的呼吁难以实现温控目标，必须依赖技术创新降低绿色溢价。 - [13:12](https://www.youtube.com/watch?v=-k-V3ESHcfA&t=792s) 盖茨认为随着植物肉企业的崛起，畜牧业减排路径已渐趋明朗，未来脱碳攻坚的核心难点转向了钢铁与水泥行业。 ## Detailed walkthrough ### [00:00](https://www.youtube.com/watch?v=-k-V3ESHcfA&t=0s) 科学挑战与三大人造肉核心问题 Mark Rober 正在为世界首富比尔·盖茨（Bill Gates）准备汉堡，但这块汉堡肉饼暗藏玄机——它完全是由纯植物原料制作而成的，以至于即使生吃也完全安全。作为惯例，Mark 每年都会在频道推出的 12 支视频中拿出专门的一期，用来展示聪明人如何运用科学与技术改善世界：两年前他介绍过售价仅 51 美分、却能取代 10,000 美元传统医疗设备的纸质离心机与折纸显微镜（Paperfuge）；去年则是能将污染泥水净化为清洁饮用水的神奇净水粉，也正是在那时他初次结识了盖茨，并用微波炉加热的披萨卷（pizza rolls）赢得了对方的尊重。长期以来，Mark 一直关注着植物人造肉领域的进展。在正式评测前，他坦承自己其实是个狂热的肉食主义者，从小到大几乎顿顿离不开肉，最喜欢的食物就是美式烧烤（barbecue）。但他坚信科学方法，决定彻底搞清楚人造肉的底层逻辑。为此，他设立了三项主要考察问题： 1. **口感与体验**：它的味道、外观、质感和气味如何？能否成功欺骗大脑，让人以为这就是真肉？ 2. **健康与营养**：它到底是由什么构成的？是某种实验室化学合成混合物，还是天然成分？其蛋白质含量如何与真正的牛肉汉堡相提并论？ 3. **环境影响**：它对地球环境的益处究竟微乎其微，还是有上百倍的质的飞跃？ Mark 指出，传统工厂化养殖（factory farms）的现状令人堪忧：牛群终其一生见不到一片青草，智商普遍高于犬类的猪只则一辈子被困在拥挤冰冷的水泥地上。传统养殖场追求极致的低成本效率，根本不在乎动物福利。以往所谓的“素肉汉堡”（veggie burger）无论口感还是形态都无法满足肉食爱好者的需求；而如今植物肉行业的策略发生了根本转变——专门面向传统肉食者开发，通过在色泽、气味、咀嚼感上无限逼近真肉，从而大幅降低人们在烧烤聚餐时尝试无肉汉堡的门槛。 ### [02:35](https://www.youtube.com/watch?v=-k-V3ESHcfA&t=155s) 探访 Beyond Meat 实验室与真味实测为了亲眼求证植物肉的制造原理，Mark 先在户外烤炉上做了一次初步烹饪测试。当肉饼落在烤网上的瞬间发出了逼真的嗞嗞声（sizzle），滴落的油脂引燃了火焰，香气与切开后的质感都与普通牛肉汉堡毫无二致。随后，他亲自飞往该领域的头部企业——Beyond Meat 和 Impossible Foods。在 Beyond Meat 的研发实验室，Mark 见到了身着白大褂的专业科研团队，这一幕让他打趣道：“This feels like 'Jurassic Park,' you know, where they're, like, giving you the tour.” 工程师们向他展示了核心配方原料托盘。公司不仅成立了专门的团队攻关味道，还针对质地、颜色、香气、煎烤声响以及卡路里和蛋白质配比进行了专项研究： - **颜色呈现**：提取自甜菜等植物天然色素； - **脂肪与煎烤感**：采用椰子油（coconut oil）与葵花籽油（sunflower oil），遇热融化滴落产生滋滋声与香气； - **碳水化合物**：来自马铃薯淀粉； - **蛋白质主体**：主要萃取自黄豌豆（yellow peas）。这类植物汉堡由于不含胆固醇而更加健康，但由于椰子油含有饱和脂肪，也不能将其等同于毫无酱料的素色拉。在 Beyond Meat 厨房中，专业大厨 Chef Chris 指导 Mark 煎烤植物意大利香肠和汉堡饼，以便为即将到来的盖茨之宴做准备。尝过一口纯植物意式香肠后，Mark 彻底被其肉汁与风味折服：“There's no way I would've guessed I wasn't actually eating real meat.” ### [05:09](https://www.youtube.com/watch?v=-k-V3ESHcfA&t=309s) 揭秘 Impossible Foods 与植物蛋白的科学优势随后，Mark 走访了 Impossible Foods。在研发人员的指导下，他亲自动手利用五个碗中的基础原料现场揉捏制作了一块植物汉堡肉饼： ```mermaid flowchart LR accTitle: Impossible Burger Composition accDescr: 植物汉堡肉饼的组成配方流程 subgraph Protein["蛋白质与水分"] A["大豆蛋白与水"] B["马铃薯蛋白"] end subgraph Flavor["风味核心"] C["大豆血红红素 (Heme)"] end subgraph Texture["质感与脂肪"] D["植物纤维粘合剂"] E["椰子油与葵花籽油"] end Protein --> Flavor Flavor --> Texture Texture --> F["手工折叠捏制肉饼"] ``` 在制作过程中，研发人员揭示了赋予肉类灵魂的核心“魔法原料”——**血红素（heme）**（血红蛋白的简称）。血红素存在于地球上所有的动植物体内，正是它让肉具有独特的“肉味”；Impossible Foods 通过从大豆根瘤或微生物发酵技术中提取植物来源的血红素，完全摆脱了对动物屠宰的依赖。工作人员向 Mark 透露： > “96% of the folks who are ordering our product are self-identified meat eaters.” 对方进一步强调，产品就是要为肉食者提供毫无妥协的替代方案：“When it delivers in that same characteristic that meat does, it really proves the point that we are providing a no-compromises alternative for those meat eaters out there to make a different choice.” Mark 由此探讨了文化中长期将“吃肉”与“男子气概”捆绑的广告营销现象（“Eat like a man, man”）。但科学事实表明，普通肉食者每天约有一半的蛋白质本身就来自豆类、坚果和谷物。不仅如此，众多顶尖运动员——如阿诺德·施瓦辛格（Arnold Schwarzenegger）、凯里·欧文（Kyrie Irving）、刘易斯·汉密尔顿（Lewis Hamilton）、威廉姆斯姐妹（Venus & Serena Williams）以及内特·迪亚兹（Nate Diaz）——都转向了纯植物饮食。相关科学研究显示，植物性饮食能在短短三周内将人体的炎症指标降低近 30%，从而显著加速高强度训练后的肌肉恢复。为了在去见比尔·盖茨前获得更具说服力的“大样本盲测”数据，Mark 邀请朋友和孩子们前往一家供应 Impossible Burger 的餐厅。成人可能会因为客气而夸赞，但小孩子往往坦诚得不留情面。当孩子们大口吃着多汁的汉堡连连赞叹时，Mark 揭晓了肉饼是由全植物制作的真相。孩子们的第一反应全是不敢置信：“Wait, what? You're lying.” 在确认了口感连挑剔的儿童都能征服后，Mark 终于带着信心走进了比尔·盖茨的私人厨房。 ### [08:29](https://www.youtube.com/watch?v=-k-V3ESHcfA&t=509s) 与比尔·盖茨在厨房会面与植物肉品尝 Mark Rober 抓紧最后一小时去超市采购食材，随后在厨房迎接比尔·盖茨（Bill Gates）。两人寒暄后，Mark 解释自己想和盖茨探讨植物肉的前景并进行现场品尝。为了设立一个口感对照组，Mark 特意准备了西雅图当地著名的 Dick's Drive-In 汉堡，因为盖茨是这家汉堡店的忠实粉丝。两人先各咬了一口传统的真牛肉汉堡来清空味蕾，Mark 开玩笑说作为一个非西雅图本地人，这种口味可能需要慢慢适应，而盖茨则表示：“是的，人总会习惯某种特定的汉堡味道。”（“Yeah, you get used to a certain burger.”）紧接着，Mark 递上自己烹饪的植物肉汉堡。盖茨品尝后给出了积极的反馈，认为这款植物肉的质感极佳，远远超越了过去的技术水平。两人谈到传统的素食蔬菜饼（veggie burger）与如今新一代植物肉的差异。盖茨强调植物基食品领域的创新远未结束，随着技术不断迭代，未来的品质还会持续跃升，企业终将实现让消费者完全无法分辨真肉与植物肉的目标。随后 Mark 又端出了精心煎制的植物基德式小香肠（bratwurst），盖茨试吃后同样赞赏连连。 - 盖茨对比新旧素肉技术：“这比他们以前做出来的东西要先进光年之多。”（“I mean, that's light-years away from what they used to make.”） - 盖茨对行业创新的展望：“如果植物基领域的研发人员不停止创新，他们声称最终你将无法分辨出其中的区别。”（“If the plant-based guys are not done innovating, eventually, they claim you won't be able to tell the difference.”） --- ### [09:54](https://www.youtube.com/watch?v=-k-V3ESHcfA&t=594s) 畜牧业对气候的影响与能量转换低效性在确认了植物肉的味道与口感表现后，Mark 向盖茨抛出了关于环境影响的核心问题。盖茨拆解了农业领域的碳排放结构：整个农业部门占全球温室气体排放总量的约 18%，而畜牧业就占了其中近一半（约 9%），并且其中绝大部分来自于牛肉养殖。当 Mark 询问排气来源是牛放屁还是打嗝时，盖茨澄清牛打嗝产生的甲烷实际上比放屁还要略多一些。Mark 指出，仅畜牧业这一个部门产生的温室气体，就超过了全球所有汽车、卡车、火车、轮船和飞机的排放总和。盖茨进一步解释，牛肉生产在能量转换上极其低效，投入产出比几乎高达 8:1。为了生产 1 卡路里的牛肉热量，人类必须喂给牛大约 8 卡路里的饲料，因为大部分能量都在维持牛自身的骨骼生长、呼吸和生理消耗中损耗掉了。Mark 从物理和生态角度剖析，人类本质上是“太阳能驱动”的生命：人吃植物获取光合作用转换的能量；即便人吃动物，动物也是吃植物生长的。在这个能量链路中，牲畜只是一个极度低效的“中间商”。 ```mermaid flowchart TD accTitle: 能量与资源在传统牛肉与直接植物饮食之间的转换效率对比 accDescr: 对比太阳能通过植物直接被人体吸收，与通过牛作为低效中间商造成的能量损耗与土地消耗 subgraph DirectPlant["直接植物摄入路径（高能效）"] Sun1["太阳能"] --> CropsDirect["农作物 / 植物"] CropsDirect --> HumanDirect["人体吸收 (90%日常能量，占用极少土地)"] end subgraph LivestockMiddleman["以牛为中间商路径（极低效：8:1 能量损耗）"] Sun2["太阳能"] --> FeedCrops["饲料农作物 (大量耕地)"] FeedCrops --> Cow["牛 (骨骼构建 / 呼吸代谢消耗7/8能量，打嗝排放甲烷)"] Cow --> MeatEnergy["牛肉 (仅提供人类10%日常能量，占用绝大部分土地)"] end ``` - 农业与畜牧排放占比：农业占全球总排放约 18%，畜牧业占该 18% 的一半左右，其中几乎全与牛肉相关。 - 饲料热量转化比：生产 1 卡路里牛肉需要消耗约 8 卡路里的牛饲料热量。 - 人类热量结构：普通人平均每天仅有 10% 的热量来自肉类，其余 90% 来自植物等非肉类来源。 - 土地资源分配极度失衡：全美用于养殖牲畜的土地加上专门种植动物饲料的农田，占用了极其庞大的国土面积；相比之下，供给人类直接食用的农作物用地仅占微小的一部分。 --- ### [11:29](https://www.youtube.com/watch?v=-k-V3ESHcfA&t=689s) 资源消耗对比与全球肉类需求危机为了让资源浪费的规模更具象化，Mark 用水资源和主食做了一组对照：生产仅 24 块汉堡肉饼所需的水量，相当于一整座游泳池的蓄水量；而同样多的水，足以生产 75 条全麦面包和 30 罐花生酱。如果做成热量与蛋白质几乎等同于汉堡肉饼的花生酱三明治，按每天吃两个计算，24 块肉饼只能吃一个多星期，而用等量水资源生产的花生酱三明治可以吃上一整年。Mark 指出，如果全球各国直接食用喂给牲畜的粮食，省下的资源足以额外养活全球 35 亿人口。盖茨指出，伴随着经济发展和财富增长，人们对肉类的摄入量往往会显著上升；若不采取干预措施，该部门的碳排放将随时间持续扩大。Mark 指出过去 50 年肉类消费量呈爆发式增长，原本被视为奢侈品的肉类已变为日常大宗消费品。为了满足对牛肉日益膨胀的需求，南美农民甚至直接放火焚烧亚马逊雨林来开辟牧场。目前亚马逊雨林已有 20% 遭到不可逆的摧毁，这造成了双重环境打击：一方面增加了产肉牛群的甲烷排放，另一方面燃烧树木使固化在植物中的碳被大量释放为二氧化碳。 - 盖茨对未来消费趋势的警示：“特别是当人们变得更富有时，他们往往会吃更多的肉。如果我们什么都不做，这个行业的排放量实际上会随着时间推移而增长。”（“Particularly as people get richer, they tend to eat more meat. If we don't do anything, this sector will actually grow over time.”） - 水资源消耗对比：生产 24 块牛肉饼的水，可制作 75 条全麦面包与 30 罐花生酱。 - 粮食冗余估算：停止将粮食喂给牲畜、直接供人食用，可多供养全球 35 亿人。 - 雨林破坏：全球肉类需求已导致亚马逊雨林 20% 的面积被永久砍伐焚毁用于放牧。 --- ### [13:12](https://www.youtube.com/watch?v=-k-V3ESHcfA&t=792s) 气候正义、技术创新与个人饮食减量盖茨进一步点出气候危机中最残酷的现实：受气候灾害打击最深重的，恰恰是生活在赤道附近、极度贫困的农民群体，干旱、极端高温和洪水将无情摧毁他们的生计。如果仅仅依靠道德呼吁让人类做出巨大的个人牺牲——比如不吃肉、不开车、不去旅行——这是极不现实的，缺乏创新的被动减排无法阻止全球气温上升超过 2 摄氏度。盖茨直言：“如果不依靠创新，我们的升温幅度很可能会远远超过两度。”（“It's such a dramatic set of sacrifices that everybody has to engage in that, without innovation, we're probably gonna go way past the two degrees.”） Mark 认为植物肉正是解决这一死结的技术突破口。随着市场规模扩大，植物肉的生产成本将显著低于真肉，未来不仅在风味和质感上做到与肉类无异，还会带来更健康、更环保且价格便宜一半的绝对优势，使大众能够毫无痛感地实现消费替代。面对气候议题，Mark 表达了现实的行动方案： - **拒绝非黑即白的极端主义**：不需要立刻变成纯素食主义者（vegan），也不必像情景喜剧角色 Ron Swanson 那样走向全肉食极端。 - **阶段性减量**：Mark 自身并未完全戒肉，但已将个人肉类摄入量削减了一半以上，打破了“每顿饭必须有肉才叫正餐”的思维定势。 - **低门槛参与**：推行“无肉星期一”（Meatless Monday），或者在汉堡王（Burger King）、卡乐星（Carl's Jr.）等连锁快餐店尝试植物肉选项，就能在宏观上产生巨大的减排聚合效应。在探讨未来挑战时，盖茨坦言自己原本以为牲畜减排是气候问题中最棘手的一环，但随着植物肉企业的崛起，这一领域已经看到了曙光；现在让他感到最棘手、仍在苦思冥想的难题，转向了钢铁和水泥行业的脱碳。视频尾声，Mark 拿出冷冻的比萨卷（pizza rolls）开玩笑要请客，随即承认这只是道具并放过了盖茨，盖茨笑着惊呼：“你骗了我，Mark Rober！”（“You tricked me, Mark Rober!”） - 盖茨对气候难题优先级的重估：“实际上我原本以为在所有最棘手的气候难题中，牲畜问题会是最艰难的。现在随着这些公司以及该领域其他新玩家的加入，我会说钢铁和水泥成为了我目前仍在挠头苦思的两大难题。”（“I actually thought of all the toughest climate problems that livestock was going to be the toughest. Now with these companies and other ones coming along in this space, I'd say steel and cement are now the two that I'm still scratching my head.”） ## Notable quotes > [13:12](https://www.youtube.com/watch?v=-k-V3ESHcfA&t=792s) It's such a dramatic set of sacrifices that everybody has to engage in that, without innovation, we're probably gonna go way past the two degrees. — Bill Gates > [08:29](https://www.youtube.com/watch?v=-k-V3ESHcfA&t=509s) If the plant-based guys are not done innovating, eventually, they claim you won't be able to tell the difference. — Bill Gates ## Mentioned Mark Rober, Bill Gates, Beyond Meat, Impossible Foods, Chef Chris, Dick's Drive-In, Burger King, Carl's Jr., Arnold Schwarzenegger, Kyrie Irving, Lewis Hamilton, Venus Williams, Serena Williams, Nate Diaz, Paperfuge, CrunchLabs, NEXT for Autism ## Video description Sometimes the scientific method takes us to new frontiers. I started a company called CrunchLabs where we build a toy together and then I teach you all the juicy physics for how it works. So if you want to learn to think like an engineer and have really fun time doing it, check out the current promotion where you get 2 FREE boxes at https://crunchlabs.com You should also go subscribe to the CrunchLabs YouTube channel cause we’ve got some bangers in the pipeline- https://www.youtube.com/crunchlabs Thanks to these folks for providing some of the music in the video: Ponder - https://youtube.com/@Pondermusic Laura Shigihara - @supershigi Andrew Applepie - https://soundcloud.com/andrewapplepie Blue Wednesday - https://soundcloud.com/bluewednesday MERCH (all proceeds go to NEXT for Autism): They are soft- https://teespring.com/stores/markrober [Source](https://www.youtube.com/watch?v=-k-V3ESHcfA)

Source quotes

[13:12] Bill Gates: It's such a dramatic set of sacrifices that everybody has to engage in that, without innovation, we're probably gonna go way past the two degrees. [8:29] Bill Gates: If the plant-based guys are not done innovating, eventually, they claim you won't be able to tell the difference.

Source quotes

[13:12] Mark Rober: And remember, it doesn't have to be binary, like you either eat no meat or you're frickin' Ron Swanson. [9:54] Bill Gates: You use eight calories to feed that cow for every calorie of meat you get out of it because you're building bone and respiration for that cow.

Original transcript

[0:00] - That's me, that's the richest man in the world, [0:02] and that's the burger I just made him. [0:03] But there's a catch. [0:04] The patty in that burger is made from this stuff. [0:08] And the reason I can eat it raw [0:09] is it's made entirely from plants. [0:12] As you guys know, every year, [0:13] I dedicate one of my 12 videos to showcase how clever people [0:16] are using science and technology [0:18] to change the world for the better. [0:19] So, for example, two years ago, [0:21] it was a paper centrifuge and microscope [0:22] that could diagnose malaria for 51 cents [0:24] versus $10,000 for traditional equipment. [0:27] And then last year, it was a magical powder [0:28] that helps poorer countries [0:30] turn contaminated muddy water into clear drinking water. [0:33] That's also when I first met Bill, [0:34] and he earned my forever respect [0:36] after I microwaved up some pizza rolls for him, [0:38] and he ate them like a champ. [0:39] I've been loosely following the progress of plant-based meat [0:42] for a couple years now, [0:43] and allegedly it looks and tastes like meat, [0:46] yet it's made from plants. [0:48] Now, at the top of this video, [0:49] I feel like I should start with a confession. [0:51] I eat meat, like, kind of a lot. [0:54] I've had some form of meat at pretty much every meal [0:57] since I was a kid. [0:58] My favorite genre of food is barbecue. [1:01] And so be that as it may, [1:02] as a firm believer in the scientific method, [1:04] I feel like it's time for me just to really buckle down [1:06] and get to the bottom of this plant-based meat thing. [1:09] And so today, on my quest for answers, [1:11] I'm looking at three main questions. [1:12] Number one, how does it taste? [1:14] And not just that, but how does it look and feel and smell? [1:17] How successfully does it trick my brain [1:19] into thinking this is real meat? [1:20] Number two, is it good for me? [1:22] If it does trick my brain, what the heck is in it? [1:24] Is it just some kind of, like, lab chemical concoction? [1:28] And also, how does it compare [1:29] to, like, the protein from a real burger? [1:31] And number three, is it good for the planet? [1:32] And on this one, I have a hunch that it is, [1:34] but is it like, meh, it's a little better, [1:36] or is it like 100 times better? [1:38] Now, I should say a big motivation for me [1:40] and something I think even my fellow meat eaters [1:42] could agree on [1:43] is that the concept of factory farms isn't great. [1:47] The whole cows that have never seen a blade of grass thing [1:50] and pigs, which by most accounts are smarter than dogs, [1:53] that live their entire lives indoors on crowded concrete. [1:56] These factories are efficient. [1:57] They're optimized for driving down costs, [1:59] not for animal well-being. [2:00] And I'm not trying to be a downer. [2:01] It's just something I don't like to think about [2:03] when I'm eating my In-N-Out Burger or Chick-fil-A. [2:06] And it's a lame excuse, [2:07] but I feel like I sort of never have had [2:08] a good alternative option. [2:10] I mean, historically, this is a veggie burger, [2:12] and nothing about this works as a burger for me. [2:14] But in recent years, [2:15] the strategy shifted to target people exactly like me, [2:18] basically try and make it as close to real meat as possible, [2:21] which reduces friction for trying a plant-based option. [2:24] So their goal is, [2:25] if I'm going meatless at the summer barbecue, [2:27] instead of a quinoa salad, [2:28] I can still enjoy the full experience [2:31] of a burger with my friends. [2:32] And so on that note, [2:33] let's get right into question number one. [2:35] Throw this puppy on the grill. [2:37] (burger sizzles) [2:38] Sizzle! [2:39] It definitely sounds like a burger [2:40] and even smells like it. [2:42] And you're getting, like, the fat dripping down, [2:43] which is causing the flames to come up. [2:46] (burger sizzles) [2:48] So, so far, the experience feels pretty analogous [2:51] to just grilling a burger. [2:57] When I lick the fork, [2:58] it definitely tastes like there was meat on this fork. [3:01] All right, this cuts and feels exactly like a real burger. [3:05] But before I officially taste it, [3:07] I kind of wanna know exactly what's in there. [3:10] And to do that, I'm gonna fly out to the two companies [3:12] who are the leader in this space, [3:13] Beyond Meat and Impossible Foods. [3:16] At Beyond Meat, the first thing they showed me [3:17] were the labs where they do all their research. [3:19] Are these actual, are these actors, [3:21] or these are real scientists? [3:22] - These are scientists, yeah. [3:24] - This feels like "Jurassic Park," [3:26] you know, where they're, like, giving you the tour. [3:28] And right out of the gate, they put my mind at ease [3:30] and showed me a tray of all the main stuff [3:31] that makes up their burgers. [3:33] Apparently, they work on not just the taste, [3:35] but they have teams of researchers [3:36] working on the texture, color, the smell, [3:38] the grilling sound, [3:40] even the same amount of calories and protein [3:43] as a meat burger. [3:43] Their goal is to make it as frictionless as possible [3:46] for people like me to make the switch. [3:47] So they have these for the color, [3:49] coconut and sunflower oil for the fat [3:51] so it sizzles on the grill, [3:52] potatoes for carbohydrates, [3:54] and then these for the protein, [3:55] the majority coming from yellow peas. [3:57] These burgers are better for you [3:58] because they have no cholesterol, [4:00] but they do have saturated fat from the coconut oil, [4:02] so you shouldn't think of this [4:03] as healthy as, like, a plain salad with no dressing. [4:06] After getting the full tour, I was feeling pretty good, [4:09] so it was time for the real test in the kitchen. [4:11] I've intentionally kept my taste buds virgin. [4:14] - Okay, great. [4:14] - And I haven't tasted it, [4:15] and I had opportunities, but, like, no, I wanna wait. [4:18] No pressure, but next week, I'm going to meet Bill Gates. [4:21] - Yeah. - And I have to cook for him. [4:23] You're like a professional chef, right? [4:24] - [Chef Chris] I am. [4:25] - In the next like 20 minutes, [4:27] you need to transfer all that knowledge [4:28] from your brain into mine, okay? [4:30] We started with their Italian sausage [4:32] made, of course, just from plants, [4:34] and Chef Chris showed me some power moves [4:36] to impress Bill with on the grill. [4:37] I'm so scared. [4:38] - [Chef Chris] Cheers. [4:39] - Okay, cheers. [4:41] Even putting flavor aside- [4:43] - [Chef Chris] I think Bill will be okay [4:44] with a little bit of a juice. [4:45] - There's no way I would've guessed [4:47] I wasn't actually eating real meat. [4:49] That's pretty good. [4:51] - [Chef Chris] Cheers. [4:52] - Cheers. [4:54] That's really good. [4:54] I need one more taste. [4:56] That's freaking good. [4:57] - Thank you. [4:57] - Next up was their burger, [5:01] which, it turns out, was equally amazing. [5:03] Genuinely, when you surround it with burger stuff, [5:06] it's really hard to tell. [5:08] - There's no way to tell. [5:09] - My next trip was to Impossible Foods, [5:11] and they actually let me make a burger myself [5:13] just from the ingredients in these bowls. [5:15] - So the first thing that we're gonna do [5:16] is add the water to the soy protein, [5:18] and then we're gonna add the potato protein. [5:20] - Okay. - So the next thing [5:21] we're gonna put in is our magic ingredient, [5:23] which, do you know what this is? [5:25] - Red #5, it's just food color. (laughs) [5:28] - So this is our magic ingredient. [5:29] It's called heme, which is short for hemoglobin. [5:32] Heme is responsible for making meat taste like meat. [5:35] That's found in every living plant and animal. [5:37] You can get heme from soy plants. [5:40] - I see. [5:41] - You don't have to get it from animals. [5:42] - Next we added the cellulose-based culinary binder [5:45] to hold everything together, [5:47] and then finally the coconut and sunflower oils. [5:50] - Have you done any pastry work in your life? [5:52] - Oh, tons of pastry work. - Okay. [5:53] You're gonna, like, fold and smush. [5:56] - All my pastry work's shining through. [5:58] - You literally just made the Impossible Burger yourself. [6:01] - Like, five little cups. - Five bowls, yeah. [6:04] - One of them was water. [6:05] - One of them was water. [6:06] - So now I think it's time to cook one of these up. [6:09] - 96% of the folks who are ordering our product [6:11] are self-identified meat eaters. [6:12] - I'm definitely your target demo. [6:13] I grew up, like, if the meal didn't have meat in it, [6:17] it wasn't a meal. [6:18] - When it delivers [6:19] in that same characteristic that meat does, [6:21] it really proves the point [6:22] that we are providing a no-compromises alternative [6:24] for those meat eaters out there to make a different choice. [6:27] - [Mark] This raised an interesting point. [6:28] Meat has been cleverly marketed with being a real man [6:31] because real men need their protein. [6:32] - [Spokesperson] That's what a man eats. [6:34] - [Spokesperson] Made from stuff guys need. [6:35] - [Spokesperson] Eat like a man, man. [6:37] - [Mark] But the truth is, even meat eaters like me [6:39] get roughly half their protein a day from plants [6:41] by eating things that contain [6:42] some kind of beans, peas, nuts, [6:45] or whole grains like corn, rice, and oats. [6:47] In fact, many high-performance athletes [6:49] are switching to a plant-based diet [6:50] because studies have shown [6:51] it can help reduce measures of inflammation [6:53] by almost 30% in just three weeks, [6:55] and inflammation makes it harder to recover after a workout. [6:58] So if a plant-based diet is good enough [7:00] for Arnold Schwarzenegger, Kyrie Irving, Lewis Hamilton, [7:02] Venus and Serena Williams, Nate Diaz, [7:04] and a growing butt ton of others, [7:06] it's probably good enough for me [7:07] and my weekly rec league soccer game. [7:09] ♪ Ballin' like Curry ♪ [7:11] - [Chef] You can ultimately utilize this [7:13] in any way you would use traditional ground beef. [7:15] - So tacos, lasagna, meatballs. [7:18] - You name it. [7:19] (mellow music) [7:25] - This is so good. [7:26] This is a plant-based burger, [7:28] and look at the mess I'm making. [7:29] So obviously I thought their burgers were also really good, [7:32] but I felt like I wanted a larger sample size [7:35] before I felt truly confident feeding Bill. [7:37] So I invited some friends to a local restaurant [7:39] that serves Impossible burgers. [7:41] And the thing is, you can't always trust adults [7:43] 'cause they might just change their answer to be nice. [7:45] - It's really good. [7:46] - Kids, on the other hand, are brutally honest, [7:49] so we ordered them plant-based burgers, too... [7:51] - Do you like it? - It's juicy. [7:52] - [Mark] But might have neglected [7:53] to mention it to them beforehand. [7:55] What do you think? [7:56] - It's really good. [7:57] - [Mark] There's no meat in that burger. [8:00] - Wait, what? [8:05] You're lying. [8:06] - [Mark] Plants. [8:08] - What? [8:09] - [Mark] That was a plant burger. [8:12] You ate a plant burger. [8:14] - Instead of meat, it was vegetables? [8:18] - It just tastes, like, extra juicy. (laughs) [8:21] - And so feeling more confident than ever, [8:22] it was time to visit Bill, [8:24] put my culinary skills to the test, [8:26] and see if he could help me answer my final question. [8:28] So I'm back in Bill's kitchen. [8:29] He's gonna be here in an hour, and I need some groceries. [8:32] (upbeat music) [8:49] All right, Bill. [8:49] - Hey. - It's good to see you again. [8:51] - How are you? [8:52] - So I've been working hard in your kitchen. [8:54] - Perfect. [8:55] - And I kind of wanted to talk to you [8:56] about plant-based meat, [8:57] and I thought maybe we could try them out as well. [9:00] - Sure. [9:00] - But as a control, [9:02] I know you're a big fan of Dick's burgers, [9:04] so to kind of cleanse the palate, [9:05] I thought we could just take a bite. [9:07] - That's the real thing. [9:08] - The real thing. [9:10] As a non-Seattle native, I've gotta say, [9:12] I think this may be an acquired taste. [9:15] - Yeah, you get used to a certain burger. [9:17] - You get used to it. [9:18] And so now it was time for my cooking. [9:20] (jaunty music) [9:24] What do you think? [9:25] - It's quite good. [9:26] I mean, that's light-years away from what they used to make. [9:29] - Like the traditional veggie burger? [9:32] - Right. [9:32] You know, the quality's gonna keep getting better. [9:35] If the plant-based guys are not done innovating, [9:38] eventually, they claim [9:39] you won't be able to tell the difference. [9:41] - [Mark] Next up was my killer bratwurst. [9:46] - Wow. Well, that's pretty good. [9:48] - [Mark] And at this point in my quest, [9:50] I felt like I had a pretty good lock [9:51] on questions one and two, [9:53] so I asked him about number three. [9:54] - The agriculture sector is about 18% of overall emission, [9:58] but livestock is about half of that 18%. [10:02] - Wow. [10:03] - And almost all of that is beef. [10:05] - Is this like cow farts, cow burps? [10:08] - Slightly more burps than farts, [10:10] but it's a mix of those two. - It's a mix. [10:12] To put that into perspective, [10:13] that means that sector alone is responsible [10:16] for more greenhouse gases than all the cars, trucks, [10:18] trains, ships, and planes combined. [10:21] Turns out it takes a lot of stuff to make a cow. [10:24] - Very inefficient, particularly beef, [10:26] it's almost eight to one. [10:27] You use eight calories to feed that cow [10:30] for every calorie of meat you get out of it [10:32] because you're building bone and respiration for that cow. [10:37] - Now, this was a really good point [10:38] I hadn't fully considered. [10:39] If you think about it, [10:40] as humans, we're really solar powered. [10:42] We eat plants, but they get their energy from the sun. [10:45] Then you might be like, "Ah, we also eat animals though." [10:47] But they get their energy from plants, too, [10:49] which, again, get their energy from the sun. [10:51] So when it comes to getting our energy from the sun, [10:54] animals are an inefficient middleman. [10:56] We get on average 10% of our calories [10:58] or energy in a day from meat. [11:00] That might sound reasonable [11:02] until you look at the amount of resources it takes [11:03] to make that meat compared to the other 90%. [11:06] If you combined all the land in the US [11:08] dedicated to raising animals, [11:09] you would get an area like this, [11:11] and then plus this much more [11:12] to grow the crops needed to feed those animals. [11:15] Now, remember, all of that is for the middleman, [11:17] for 10% of our daily energy. [11:19] Now compare that to the amount of land needed [11:21] for crops we actually eat ourselves directly. [11:24] That relatively small chunk of land [11:26] is where the overwhelming majority [11:27] of our personal energy comes from. [11:29] And it's not just land resources, but water as well. [11:32] To end up with 24 hamburger patties, [11:34] it requires the amount of water you see in this pool. [11:36] That same amount of water [11:38] could make 75 loaves of whole grain bread [11:40] and 30 jars of peanut butter. [11:42] So if I made myself a delicious peanut butter sandwich, [11:44] which has nearly the identical amounts [11:46] of both calories and proteins compared to this patty, [11:49] and then I ate two a day, [11:50] the meat would last me a little over a week [11:52] and the sandwiches would last me a little over a year. [11:56] So that's the same amount of resources used, [11:58] same amount of calories and protein to me per serving. [12:01] One just lasted me a year longer [12:03] because it's a much more efficient energy transfer method. [12:06] This is why a plant-based diet [12:07] is a way more efficient use of natural resources. [12:10] We could feed an additional 3.5 billion people worldwide [12:14] if all countries just ate the stuff they fed to animals. [12:17] And here's why that fact matters. [12:19] - Particularly as people get richer, [12:21] they tend to eat more meat. [12:22] If we don't do anything, [12:23] this sector will actually grow over time. [12:26] - So you're saying not just the fact [12:27] that there's more people and a larger population, [12:30] but as people move up towards the middle class, [12:32] they want to consume more meat. [12:33] And you could certainly see that this is true [12:35] when you look at the amount of meat consumed [12:37] over the past 50 years. [12:38] Given the resources required, [12:40] a trajectory for meat consumption like this [12:42] is simply unsustainable. [12:43] A few decades ago, meat was considered a luxury product, [12:46] but now it's a commodity for a growing number of people. [12:49] In fact, the demand is growing so much, [12:51] it now makes sense for farmers in the Amazon [12:53] just to burn it down [12:54] and to turn that forest into grazing land for animals. [12:57] We've irreversibly lost 20% of the Amazon so far, [13:01] and that's a double gut punch [13:02] 'cause now not only is that more cow farts [13:04] adding to climate change, [13:06] but when you burn those trees, [13:07] all the carbon stored inside them [13:09] goes back into the atmosphere as the greenhouse gas CO2. [13:12] - One of the great tragedies about climate [13:14] is that it's the poorest in the world, [13:17] the farmers who live fairly near to the equator, [13:19] that all this heat and flooding and droughts, [13:23] they're going to suffer by far the most. [13:26] If you're just trying to get people to cut back, [13:29] don't eat meat, don't drive to work, don't take trips. [13:33] It's such a dramatic set of sacrifices [13:36] that everybody has to engage in [13:38] that, without innovation, [13:39] we're probably gonna go way past the two degrees. [13:43] - And that last part is the silver lining. [13:45] Plant-based meat is the exact kind of innovation [13:47] Bill's referring to here. [13:48] And I'm optimistic [13:49] because as the demand for plant-based meats goes up, [13:52] the price will come down, much lower than actual meat. [13:55] So then not only will the experience [13:56] be identical to eating meat, [13:58] but it's better for you, better for animals, [14:00] and much better for the planet. [14:02] Oh, and it also costs half as much. [14:04] It just becomes a really easy decision [14:06] for people to switch in massive numbers. [14:08] All right, so what does this all mean? [14:10] Now that I've completed my quest for answers, [14:12] where do I stand? [14:13] And I'll say it still makes me really uncomfortable [14:15] to think about these factory farms [14:17] or the Amazon being burned down to make room for more cows. [14:20] But at the same time, [14:21] I can't really blame these poor remote farmers [14:24] who know nothing about what a greenhouse gas is [14:26] for just trying to feed their family. [14:28] As long as the demand for meat continues to grow, [14:30] there will be an incentive [14:32] to be not cool to our mutual friend, Mother Earth. [14:35] So the most effective thing we can do [14:37] is try and reduce that demand. [14:39] So after all this, I'm not a vegan. [14:41] I'm not even strictly on a plant-based diet. [14:43] But I have reduced the amount of meat I consume [14:46] by more than half, and I feel great. [14:49] Importantly, I broke out from that weird mindset [14:51] that for it to be considered a true meal, [14:53] it has to have some form of meat. [14:55] So if any part of this video rings true to you, [14:58] I would say don't take my word for it, [15:00] try it for yourself. [15:01] You can find plant-based meat options [15:03] in thousands of restaurants [15:04] and even at Burger King and Carl's Jr. [15:07] Most grocery stores have a whole section dedicated to them, [15:09] so you can substitute it [15:10] into your favorite home-cooked meal. [15:12] And remember, it doesn't have to be binary, [15:14] like you either eat no meat or you're frickin' Ron Swanson. [15:17] If a bunch of people did Meatless Monday, for example, [15:20] that would have a huge impact on demand. [15:22] Some of the challenges we face globally [15:24] can feel pretty daunting, [15:25] and so I love seeing clever people [15:27] innovating on the front lines, [15:28] trying to make it as easy as possible [15:30] for the rest of us to make the right choices. [15:33] It gives me hope about our future here together [15:34] and inspires me to wanna do my part. [15:38] - I actually thought of all the toughest climate problems [15:41] that livestock was going to be the toughest. [15:43] Now with these companies [15:45] and other ones coming along in this space, [15:47] I'd say steel and cement are now the two [15:50] that I'm still scratching my head. [15:53] - Well, if anyone's gonna be scratching their head [15:55] to solve the problem, [15:56] I think humanity is grateful Bill Gates is the one doing it. [15:59] So on behalf of, I don't know, the world, [16:01] we appreciate the efforts you're making in this. [16:04] I have some celebratory pizza rolls. [16:06] Last year, I made you eat- - Oh! [16:07] - Actually, they're frozen. [16:08] You don't want those. - Uh-oh, thank you. [16:10] - It's just a prop. [16:11] I'll spare you. [16:13] - You tricked me, Mark Rober! [16:17] (upbeat music)