Can You Save the Planet by Being Vegan?

Affiliate disclosure: Some links on this page may earn us a small commission at no cost to you.

Can You Save the Planet by Being Vegan?

“Can you save the planet by being vegan?” is the wrong question with a useful answer inside it. No, one person’s diet does not save the planet; the planet does not work that way. But diet is one of the few climate levers entirely in your control, and the numbers behind it are bigger than most people expect. Here is what the research actually says, including the parts vegan advocates prefer to skip.

Carbon emissions put our planet at risk

The Environmental Case for Veganism

The core argument is simple: animal agriculture is an inefficient middleman. Growing feed crops, feeding them to animals, and eating the animals wastes most of the energy and land involved. Poore and Nemecek’s 2018 analysis in Science, the most comprehensive study of food’s environmental impact ever conducted, found that meat and dairy provide just 18 percent of the world’s calories while using 83 percent of farmland and producing the majority of food-related greenhouse gas emissions. A global shift to plant-based diets could cut food’s land use by 76 percent and its emissions by nearly half.

Baby cows on a farm

It is not just the animals. A huge share of the world’s corn, soy, and wheat is grown specifically as animal feed. Eating plants directly frees that land and water for food humans actually eat.

The Honest Counterpoints

Veganism is not impact-free, and pretending otherwise undermines the good arguments:

• Crop production has costs too. Soy, almonds, avocados, and other plant staples use land and water and can drive deforestation depending on where and how they are grown. A vegan diet built on air-freighted out-of-season produce is not the climate win the bumper sticker implies.
• Processing matters. Ultra-processed vegan meats and cheeses require significant energy and industrial inputs. A Beyond Burger beats a beef burger on emissions, but it does not beat a bowl of lentils.
• Local nuance exists. In regions where grazing land cannot grow crops, some argue livestock is the best use of that land. The global numbers still favor plants overwhelmingly, but the edge cases are real.

None of this erases the headline finding. It just means “vegan” is a direction, not a purity score.

What One Person Actually Changes

Here is the number people ask for. In a large UK study of real diets (Scarborough et al., 2014), high meat-eaters’ diets produced 7.19 kg of CO2-equivalent per day, vegetarians 3.81, and vegans 2.89. So a high meat-eater going vegan cuts their diet-related emissions by about 60 percent; going vegetarian cuts them by roughly half.

Read that carefully: diet-related emissions, not your total carbon footprint. Your flights, your heating, and your car still count, and food is only one slice of the pie. But it is a slice you control three times a day, and a 60 percent cut to it is one of the largest single reductions available to an individual. For more on the broader picture, our guide on the benefits of being a vegetarian covers the environmental research in more detail.

Does It Vary by Country?

Yes, substantially. Countries with high meat consumption, like the United States and Brazil, have much larger diet-related footprints per person than countries where meat is a smaller part of the diet. Your personal savings from going vegan are biggest if you are starting from a meat-heavy Western diet and smallest if you already eat mostly plants. Obvious when stated, often missed in the discourse.

What About Healthcare Costs?

A vegan diet is associated with lower risk of heart disease and obesity, which in theory should mean lower healthcare spending. In practice, the link between veganism and personal healthcare costs is not well-established. Healthcare costs depend on genetics, overall lifestyle, access to care, and a hundred other variables. Eat plants for your health because the health evidence is good, not because you expect a rebate.

A vegan diet reduces risk for certain diseases, which could reduce healthcare costs

The Verdict

You cannot save the planet by being vegan. You can, however, cut your food-related emissions by more than half, use dramatically less land and water, and stop funding one of the most resource-intensive industries on earth. That is not nothing. It is, in fact, one of the few climate actions that also saves you money and probably improves your health. Small changes, compounded across millions of people, are how the big numbers move.

Looking for where to start? Check out our guide for beginners.