How To Eat Sustainably: Food Lists & Pro Tips To Get You Started

Of all the ways to live more sustainably, tweaking your diet has got to be one of the most impactful. We load up our plates three times a day, after all—and each one is an opportunity to support the food system we'd like to see. But where to begin?

Of course, truly sustainable diets need to take human livelihoods into account too. "Sustainability encompasses not only the environmental but also the social and economic equity aspects of the food system," Kristin Reynolds, Ph.D., chair of food studies at The New School and lecturer at Yale School of the Environment, explains.

The food industry is massive, so reducing its impact will go a long way in helping us avoid the worst impacts of climate change.

"More than a third of the land that we use globally is used for agriculture, and about a billion people work in the agriculture sector," says Bergen. And while one person changing their diet won't save our planet, director of nutrition at Tulane University Diego Rose, Ph.D., MPH, explains that if everyone did something, the savings would be huge.

It won't come as much of a surprise that the industrial livestock sector has a major environmental impact. But it's worth sharing the numbers, just because they're so staggering: Global livestock production is responsible for 14.5% of human-induced greenhouse gas emissions, according to the FAO, and while it occupies nearly 80% of agricultural land, it provides less than 20% of the world's calories.

To understand the climate impact of meat, first consider the amount of land that's required to grow food to then feed to animals. "In many places, there is competition between land use for agriculture and land use for preserving biodiversity and some of our most important forests," Bergen notes, pointing to regions like the Amazon that show how large-scale animal agriculture can destroy local communities and ecosystems.

Then, you have the emissions of the livestock itself. Ruminant animals (cows, sheep, and goats) are the worst offenders here. They have multiple stomach compartments that break down food through a fermentation process that releases methane—a powerful greenhouse gas that has 25 to 80 times the warming potential of carbon dioxide.

"That methane gas is what's really contributing to their impact," Rose notes. According to one 2017 analysis, the overall environmental impact of ruminant meat is about 100 times that of plant-based foods. Not to mention, plant-forward diets tend to be healthier than carnivorous ones by most metrics.

Livestock with a so-called monogastric (aka, one-chamber) stomach design (think chickens and pigs) do not emit methane and therefore tend to be a better pick from a sustainability perspective.

But of course, the way an animal is raised also affects its overall impact. Grass-fed meat from a small farm that uses regenerative grazing practices will be a better choice for the environment, animal welfare, and human health than meat raised on a feedlot somewhere.

Now it's time to explore where all of this leaves you: the hungry consumer with a grocery list.

First and foremost, given the complexities of the food system, it's important to note that no one food is inherently "good" or "bad" from a sustainability perspective. Again, it's all about where it comes from, how it was grown, who grew it, etc. A person's cultural background and nutritional needs will also affect their ideal diet, and not everyone has access to eco-options, so it's important not to shame or blame.

As mentioned earlier, plants tend to be a lot less resource-intensive to grow than animals. And Bergen adds that organic fruits and veggies are even better from an environmental perspective since they aren't grown using chemical pesticides and fertilizers.

Not only do these come with health concerns, but they can also be bad for soil health, made from planet-warming fossil fuels, damaging to nearby wildlife, and threatening to farmworkers. To keep the cost down, she recommends buying organic items listed on the EWG's Dirty Dozen list of the most-sprayed produce. Strawberries, spinach, kale, collard, and mustard greens currently top the list.

Regenerative agriculture takes organic concepts one step further by limiting pesticide use and using farming practices that prioritize soil health. By utilizing techniques like crop rotation, composting, and hand tilling, regenerative farms seek to support soils' natural capacity to pull carbon out of the atmosphere.

We could easily spend a whole article diving into the eco pros and cons of seafood (and we have!), but in short, small seafood tends to be best for human and environmental health.

For starters, it is less likely to be overfished in the wild, and it takes fewer resources to farm. Fish that are lower on the food chain will also naturally replenish faster than their predators. They don't accumulate as much mercury over their short lifespan, either.

"In the U.S. diet, beef is the single biggest contributor to global warming emissions," Bergen notes—by a long shot. Rose explains that in his review of the foods that Americans eat that have the highest environmental impact, the top 10 were all beef products.

If you're going to make one change to your diet, swapping a cut of beef for another protein (even another animal, like chicken or pork) is likely the one that will have the largest impact.

While lamb isn't as popular as beef (in the U.S., at least), sheep require even more land to grow and feed than cows do on average, and they also emit methane into the atmosphere.

The final ruminant animal on the list, goats and their byproducts are associated with significant greenhouse gas emissions too.

Dairy is also climate-intensive since it comes from cattle. There are plenty of alt milks to choose from these days, and while they all require different amounts of land and water to grow, Bergen says they are almost always more sustainable than dairy milk.

Also byproducts of cows and ruminant animals, cheese, butter, and yogurt are not the most sustainable options. (Trust me; it pains me to write this as much as it pains you to read it!)

The "Red List" of the Monterey Bay Aquarium's Seafood Watch flags fish associated with environmental or human rights concerns. Though it depends on where it was caught/raised, some types of fish that often make the list include shrimp, tuna, and Chilean sea bass (toothfish).

While not nearly as resource-intensive as red meat, Rose notes that many beverages have a higher footprint than you might expect. This is in part because they come with lots of packaging and tend to be pretty heavy to ship.

It also takes a lot of raw material to make our favorite drinks. "Say you make a glass of orange juice. It takes a lot of oranges to do that. And then most of what's left over gets thrown away. Same with wine or beer," he explains. "There's a lot of processing that's going on to get to that output."

While blueberries and raspberries do make for a sweet treat in winter, Rose notes that they will not be the most sustainable option. More often than not, these fragile fruits were shipped to you from somewhere else on an airplane—and have the carbon emissions to prove it. "They're particularly bad if they were grown in a greenhouse because then you have the impacts from that and the air travel," he explains. "That's a big price on the environment too."

Palm oil plantations are a major driver of deforestation around the world, particularly in Southeast Asia. The cheap oil can be hard to avoid (beyond just food, it's in tons of personal care products), so look for RSPO-certified deforestation-free palm when you can.

Like palm oil, table sugar (sucrose) is a cheap crop that's now being grown in areas of high biodiversity. (It's also pretty water-intensive to cultivate5.) Swap it for other natural sweeteners that don't have the same land-use concerns.

"Another part of eating sustainably is to reduce the amount of food you're wasting," says Bergen, because that's just energy and resources you're throwing in the trash. According to one 2014 analysis, food loss makes up a whopping 28% of the overall carbon footprint of the average U.S. diet each year; equivalent to the emissions of 33 million cars.

Compost any food scraps you do have so that they funnel back into the earth instead of decaying in a landfill (another source of planet-warming methane). Join a composting program in your community or start a bin at home using this guide.

And here's yet another reason to avoid cooking with meat: Animal scraps don't belong in your bin!

Reynolds says that avoiding food that comes in plastic packaging is another way to reduce the environmental impact of your diet, though she notes that isn't feasible for everyone. But if you do have the time and resources to shop for loose produce, get your grains from the bulk bin, or make your own package-free nut milk, by all means.

Reynolds and Bergen agree that the Good Food Purchasing Plan (recently passed by New York City and Chicago!) is one policy that stands a real chance of changing the way we consume food in this country. Encourage your local government or school board to sign on to stocking their menus with healthy and sustainably grown food.