Is factory farming the exception or the norm?

It is the norm. The large majority of farmed land animals worldwide are raised in intensive systems; extensive and pasture-based farming accounts for a small share of total production, even where it dominates the imagery used to sell it.

Why does land use matter so much?

Around three quarters of agricultural land supports animal products that supply a minority of global calories and protein. Land is therefore the link between diets, deforestation, wildlife decline and climate targets.

Do welfare reforms slow down bigger change?

The evidence does not support that trade-off. Jurisdictions that banned confinement systems have generally also seen the fastest growth in plant-based alternatives, because both follow the same shift in public attention.

Can individual choices matter in a system this large?

Individually they are small; in aggregate they are the demand signal every other stage responds to. The measurable effects come from sustained changes across many people, and from the institutions that set default meals.

Where does this newsroom get its figures?

From peer-reviewed research, government inspection and production data, and named organisations. Where estimates are contested, articles say so and give the range rather than the most striking number.

为了动物。为了地球。为了彼此。

更温柔的世界，从餐盘开始。

每年有超过 800 亿只陆地动物、数万亿海洋动物为食物被杀死。选择植物饮食，是每个人改变世界最有力的杠杆。

免费试用 VeggieOS →为什么选择植物饮食

Since you opened this page

land animals killed for food worldwide

fish & marine animals killed worldwide

The problem

The quiet cost of how we eat

Most of this happens behind closed doors. The farms have no public address, the trucks travel at night, and the slaughterhouses sit on the edge of towns we never visit. By the time the meat reaches the plate, it is unrecognisable. This isn't an accusation — it's an invitation. When people see clearly, they choose differently.

Four reasons

Why people make the shift

For the animals

Over 80 billion land animals — and trillions of aquatic animals — are killed for food each year. Most never see the sun. Choosing plants withdraws our consent from a system most of us would never approve of in person.

For the planet

The largest study of food systems (Poore & Nemecek, Science 2018) found that moving to a plant-based diet is the single biggest action an individual can take to reduce environmental impact — cutting food-related land use by 76% and emissions by up to 49%.

For your health

Decades of research — Adventist Health Studies, EPIC-Oxford, PREDIMED — keep landing on the same conclusion. People who eat mostly plants live longer, with less heart disease, less type-2 diabetes, and lower rates of several cancers.

For each other

A third of the world's grain is grown to feed farmed animals. Redirected to humans, it could nourish billions more people. Plant-based food systems are simply more efficient — and a fairer way to share a finite planet.

By the numbers

Is plant-based really better for the planet?

80%

of global farmland is used for animal agriculture

26%

of global greenhouse-gas emissions come from food systems

27%

of freshwater goes to livestock and their feed

80%

of Amazon deforestation is linked to cattle

Sources: Poore & Nemecek, Science (2018); Crippa et al. (2021); FAO; Mekonnen & Hoekstra water-footprint estimates.

Voices

A movement of quiet conviction

“The question is not, 'Can they reason?' nor, 'Can they talk?' but rather, 'Can they suffer?'”

— Jeremy Bentham, 1789

“Nothing will benefit human health and increase the chances for survival of life on Earth as much as the evolution to a vegetarian diet.”

— Albert Einstein

“A plant-based diet is probably the single biggest way to reduce your impact on planet Earth.”

— Joseph Poore, Oxford, 2018

Your pocket ally

VeggieOS —— 让你轻松吃素的免费应用。

Scan any food, cosmetic or household product and see instantly whether it's vegan, vegetarian and cruelty-free. Get plant-based alternatives when it isn't, plus a recipe converter, weekly meal planner, pantry tracker and personal impact dashboard.

Barcode scanner for ingredients & cruelty-free status
Meal planner, recipes & pantry tracker
See your real animal, water, land & CO₂e impact

Open VeggieOS →

100% free — no ads, no tracking.

Join us

Small choices, built into habits, become a movement.

Real change rarely arrives in one dramatic moment. It accumulates — meal by meal, label by label, conversation by conversation. Take the next honest step you can. We'll meet you there.

免费试用 VeggieOS →Read the case for plant-based

深入背景

食物体系背后的证据

Animal agriculture sits at the intersection of climate, land use, water, public health and animal welfare. These reference points recur across our reporting, so we keep them in one place: the numbers most often cited, the way we read a claim, the myths that survive longest, and the vocabulary you need to follow the debate in any language.

关键参考数据

~80 billion: land animals farmed and slaughtered each year worldwide
~14.5%: share of global greenhouse gas emissions linked to livestock supply chains
~77%: of agricultural land used for grazing and feed production
~70%: of freshwater withdrawals worldwide go to agriculture

Rows of crops on farmland at dawn, with mist and treeline in the distance — 土地是关键
Roughly three quarters of global farmland is used for livestock, yet it supplies a minority of the world's calories. Shifting even part of that land back to crops, forest or wetland is the single largest lever most countries hold.

五步核查一个说法

01Find the original sourceTrace the figure back to a study, dataset or public record rather than a headline restating it.
02Check the boundaryAsk what the number counts: farm gate only, or land use, feed, transport and processing too.
03Compare like with likePer kilogram, per gram of protein and per calorie can point in different directions.
04Look for the rangeCredible estimates come with uncertainty; a single precise-sounding figure often hides it.
05Ask who is affectedAnimals, workers, neighbouring communities and future readers all carry part of the cost.

误解与证据

常见说法	证据显示	为何重要
Local food is always the lowest-carbon choice	Transport is a small share of most food footprints; what is produced matters more than how far it travelled.	It redirects effort towards the choices with real leverage.
Plant-based eating cannot meet protein needs	Legumes, grains, soy foods, nuts and seeds cover protein and amino-acid needs in well-planned diets at every life stage.	Nutrition myths keep people from a change they were open to.
Higher-welfare labels mean animals are not harmed	Label standards vary widely and many permit routine practices readers would not expect.	Informed choices depend on knowing what a label actually certifies.
Individual choices are irrelevant next to policy	Demand shifts change what is produced, funded and legislated; the two move together.	It replaces fatalism with something you can act on this week.

议题词汇表

Factory farming: Intensive confinement systems that maximise output per animal and per unit of space.
Life-cycle assessment: A method that totals environmental impact across every stage of a product's life.
Sentience: The capacity to feel, perceive and experience — the basis of most animal-welfare law.
Land-use change: Conversion of forest, grassland or wetland into farmland, and the emissions it releases.
Food-system resilience: How well supply survives drought, disease and price shocks.
Just transition: Policy that protects farmers and workers while production shifts.

实用导读 · advocacy

看懂问题的全貌

好的环境新闻帮助你定位问题、核查说法，并决定下一步阅读什么。我们把证据、背景和可行路径放在一起，不把复杂议题简化成口号。

证据

研究驱动

背景

相互关联

下一步

可实践

如何使用本栏目

从这里开始	你会看到	适合
The overview	A clear answer and the essential terms	First-time readers
The evidence	Sources, comparisons and reported context	Checking a claim
The pathways	Related topics, tools and further reading	Going deeper

读者常问

Is this information opinion or reporting?

We separate evidence, interpretation and practical guidance. Claims should be traceable to research, public records or clearly identified editorial analysis.

Can one choice solve these problems?

No. Food systems, animal welfare and climate are connected systems. Individual choices matter, and so do policy, business and collective action.

Where should I continue?

Use the related topics, topic hubs and calculators on this page to move from a quick answer to the primary context behind it.

从证据到日常选择

这些数据落到餐盘上是什么样

Numbers describe the system; meals, votes and purchases are how most people meet it. This field guide turns the reporting into concrete swaps, a four-week plan and the signals worth watching, so a page of research becomes something you can act on this week without pretending the hard parts are simple.

效果最明显的替换

与其	不如试试	为何重要
Beef mince	Lentils, beans or soy mince	Beef carries by far the highest emissions and land use per gram of protein.
Dairy milk	Soy or pea milk	Comparable protein with a fraction of the land, water and emissions.
Cheese in daily meals	Nut or seed-based spreads, cashew cheese	Cheese is the most resource-intensive dairy product per kilogram.
Chicken and eggs	Tofu, tempeh, chickpeas	Removes the welfare cost of the most intensively farmed animals.
Farmed shrimp and salmon	Beans, jackfruit, seaweed-seasoned dishes	Avoids mangrove loss, bycatch and wild fish used as feed.
Butter	Olive or rapeseed oil	Lower emissions per kilogram and better cardiovascular profile.

一个可坚持的四周计划

Most people who change their diet permanently do it gradually, one meal slot at a time, keeping the food they already like at the centre.

01Week 1 — breakfastChange the meal with the fewest variables: swap milk, add fruit, keep everything else identical.
02Week 2 — three dinnersCook three plant-based dinners you already know how to make well, rather than new recipes.
03Week 3 — restockRebuild the cupboard around pulses, grains, tinned tomatoes, nuts and frozen vegetables.
04Week 4 — eating outFind two reliable options near work or home, so social meals never become the failure point.

A busy open-air market stall stacked with fresh vegetables, pulses and grains in crates — 改变最先显现的地方
Markets are the clearest place to watch demand shift: as pulses, grains and vegetables take more shelf space, producers, buyers and policy follow the money rather than the argument.

值得关注的信号

Retail shelf shareHow much space plant-based products hold is a better indicator than launch announcements.
Cage and crate bansLegislation on confinement moves faster than diet change and affects billions of animals.
Feed-crop areaLand planted for animal feed shows whether production is actually shifting.
Institutional menusSchools, hospitals and canteens change the default meal for millions at once.
Price parityWhen plant-based costs the same or less, adoption stops depending on conviction.
Transparency rulesLabelling and inspection records determine what the public can even see.

实用问题

Do I have to change everything at once?: No. Reducing the most resource-intensive foods most often — beef, cheese and farmed fish — produces most of the measurable effect, and partial changes maintained for years outperform strict changes abandoned in a month.
Is plant-based eating more expensive?: Staples such as lentils, beans, rice, oats, seasonal vegetables and tofu are among the cheapest sources of protein and calories. Cost rises mainly with processed meat substitutes, which are optional.
What about nutrients like B12, iron and omega-3?: A B12 supplement is standard advice for anyone eating mostly or entirely plant-based. Iron comes from legumes, tofu and greens, absorbed better with vitamin C; omega-3 from flax, walnuts, chia or an algae supplement.
Does any of this reach the animals themselves?: Demand determines how many animals are bred, and legislation determines how they are kept. Reporting tracks both because neither works alone.

这一体系究竟如何运转

本报道所覆盖的食物体系地图

Most coverage of animals, diets and climate arrives as isolated stories: a slaughterhouse investigation, a methane figure, a supermarket launch. They belong to one system with a small number of decision points. This map sets out that system stage by stage — who owns each step, where animals enter it, what the public can see, and which levers have historically moved it — so every article on this site can be read in context rather than as an isolated shock.

从农田到餐桌，逐个环节

Animal agriculture is a chain of separate businesses. Pressure applied at one link rarely stays there; it moves upstream to feed and land, or downstream to retail and price.

环节	发生了什么	杠杆在哪里
Land and feed	Soy, maize and grass are grown to feed animals, using roughly three quarters of agricultural land worldwide.	Deforestation rules, feed-import standards, and any fall in demand for animal products.
Breeding	Genetics companies supply fast-growing birds and high-yield dairy lines used across most of the industry.	Growth-rate standards; welfare commitments that specify breed, not just space.
Rearing	Animals are housed at density, typically indoors, with confinement systems that vary by species and country.	Cage, crate and stocking-density law — the fastest-moving area of animal legislation.
Transport and slaughter	Live animals move to centralised plants; a small number of companies process most of the volume.	Journey-time limits, CCTV and inspection rules, stunning requirements.
Processing and brands	Meat and dairy become branded products, with margins concentrated in processing rather than farming.	Labelling law, marketing claims, and corporate sourcing commitments.
Retail and food service	Supermarkets, canteens and restaurants set the default meal for most people most days.	Shelf share, menu defaults, procurement contracts and price parity.
The plate	Households choose within the range and prices the previous stages allow.	Repeat purchases, which retailers track far more closely than surveys.

真正的决策者

Individual choices matter, but they are amplified or blunted by a handful of institutions that set defaults for millions of meals at a time.

Supermarket buyersA handful of buyers decide what fills the shelves of an entire country, and their sourcing standards travel back up the chain to farms.
Public procurementSchools, hospitals, prisons and armed forces buy meals in bulk; changing the default menu shifts millions of meals without asking anyone to change their mind.
Regulators and inspectorsWhat can be documented determines what can be enforced. Inspection frequency and CCTV rules decide whether standards exist on paper or in practice.
Subsidy designAgricultural support still flows mainly to animal products and feed crops, keeping prices below what the resource use would otherwise imply.
Investors and lendersFinancing terms for new sheds, expansions and processing capacity set the size of the industry a decade ahead.
Courts and citizen initiativesReferenda, lawsuits and ballot measures have repeatedly delivered confinement bans that legislatures would not pass on their own.

Wide farmland landscape divided into crop fields under an open sky — 土地是被忽略的变量
Most farmland on earth feeds animals rather than people directly. That single fact explains why diet, deforestation, wildlife loss and climate keep turning up in the same story.

同一体系，不同的着力点

地区	决定结果的因素
European Union	Confinement law and labelling lead globally; the unresolved question is imported animal products produced to lower standards.
United States	State ballot measures drive welfare change while federal rules lag; litigation over interstate sales is the recurring battleground.
Brazil and South America	Feed-crop expansion and cattle ranching sit at the interface with forest loss, making land use the decisive issue.
China and East Asia	Rapid growth in intensive production alongside fast-growing plant-based and cultivated protein investment.
India and South Asia	The world's largest dairy sector, where welfare questions centre on cattle, transport and the fate of male calves.
Sub-Saharan Africa	Smallholder systems dominate today; whether intensive models are imported is still an open decision.

已经发生的改变

Change in this system is slow, then sudden. These are the shifts that repeat across countries once they start.

01Battery cagesBans moved from single countries to whole blocs, then to corporate commitments covering supply chains beyond the law.
02Sow stalls and veal cratesRestricted in a growing list of jurisdictions once footage made routine confinement visible to voters.
03Plant-based milkMoved from specialty shelf to standard option in cafés and supermarkets within roughly a decade.
04Slaughterhouse CCTVIntroduced after undercover footage, converting sporadic scandal into continuous documentation.
05Deforestation-linked feedImport rules now require supply-chain evidence, tying European diets to land use elsewhere.
06Institutional menusCities and universities adopting plant-based defaults have produced the largest single-decision emissions cuts in catering.

如何判断关于养殖与饮食的说法

Most disputes come down to a handful of recurring tricks. Running a claim through these questions resolves the majority of them.

Per what?Impacts per kilogram, per gram of protein and per calorie tell different stories. Ask which one is being used and why.
Whose average?A best-case farm is not a national average, and a national average is not the global one behind imported products.
Who funded it?Industry-funded studies are not automatically wrong, but disclosure changes how much weight a single result deserves.
Legal or actual?A practice being legal says nothing about how common it is; enforcement records are the better source.
Is the comparison fair?Comparing a processed substitute to a raw ingredient, or a farm to a factory, usually smuggles in the conclusion.
What would change your mind?Claims that no evidence could falsify are advocacy, from any direction, and should be read as such.

关于这一体系的常见问题

Is factory farming the exception or the norm?: It is the norm. The large majority of farmed land animals worldwide are raised in intensive systems; extensive and pasture-based farming accounts for a small share of total production, even where it dominates the imagery used to sell it.
Why does land use matter so much?: Around three quarters of agricultural land supports animal products that supply a minority of global calories and protein. Land is therefore the link between diets, deforestation, wildlife decline and climate targets.
Do welfare reforms slow down bigger change?: The evidence does not support that trade-off. Jurisdictions that banned confinement systems have generally also seen the fastest growth in plant-based alternatives, because both follow the same shift in public attention.
Can individual choices matter in a system this large?: Individually they are small; in aggregate they are the demand signal every other stage responds to. The measurable effects come from sustained changes across many people, and from the institutions that set default meals.
Where does this newsroom get its figures?: From peer-reviewed research, government inspection and production data, and named organisations. Where estimates are contested, articles say so and give the range rather than the most striking number.