A blueprint for feeding the world
By 2050, every person could access nutritious, culturally familiar food while protecting the planet. The 2025 EAT-Lancet Commission on Healthy Diets From Sustainable Food Systems presents a “planetary health diet” as the key to achieving this.
The report finds that combining this diet with sustainable farming and reduced food waste could feed 9.6 billion people equitably. Researchers from over 35 countries contributed, showing that global food-related greenhouse gas emissions could fall by more than half if nations act together.
Currently, food production, processing, and transportation account for roughly 30% of emissions. Most of the rest comes from fossil fuel use and clearing forests for farmland.
What the planetary health diet includes
The diet emphasizes fruits, vegetables, whole grains, legumes, and nuts. It allows moderate meat and dairy consumption while limiting added sugar, salt, and saturated fat. “This diet protects both human health and the planet,” said Dr. Walter Willett of Harvard University.
He recommends one serving of dairy and one serving of animal protein daily, such as fish, poultry, or eggs. Red meat, including beef and pork, should be limited to one 4-ounce serving per week. “It’s balanced, flexible, and similar to the Mediterranean diet,” Willett said.
Beyond individual food choices
Johan Rockström, co-chair of the commission and director of the Potsdam Institute for Climate Impact Research, said diet alone is not enough. “We must reduce food waste and adopt sustainable land, water, and nutrient management,” he explained. “Healthy food must be affordable and accessible for everyone.”
Facing industry resistance
The 2019 EAT-Lancet report estimated that global adoption of the planetary health diet could prevent 11.6 million premature deaths each year. The 2025 update raises that figure to 15 million. In the U.S., roughly 31% of premature adult deaths could be avoided.
Transforming the global food system could save $5 trillion annually by lowering health costs, restoring ecosystems, and slowing climate change. The necessary investment — $200 to $500 billion — is small compared to the potential benefits.
Opposition remains strong. Campaigns like #YestoMeat spread misinformation in 2019, and Willett said similar tactics are resurfacing. “Some groups push meat-heavy diets while downplaying livestock’s environmental impact,” he said. “This report relies on independent, global scientific evidence.”
The consequences of inaction
If current trends continue, agricultural emissions could rise by 33% by 2050. Nearly 70% of ecosystems have already lost more than half of their natural areas, mostly to farming.
The planetary health diet could reduce emissions by 60% compared with 2020 levels. Cattle numbers would fall by 26%, freeing 11% of grazing land. “This could help prevent further deforestation in the Amazon,” Willett said.
Aquatic food production could rise by 46%, vegetables by 42%, fruits by 61%, nuts by 172%, and legumes by 187%. Overall, food prices could drop by about 3%.
Creating a fair and sustainable food system
Christina Hicks from Lancaster University said the wealthiest 30% of people cause more than 70% of food-related environmental harm. Fewer than 1% currently meet their food needs without damaging the planet.
The commission recommends shifting subsidies from meat and dairy to sustainable crops such as fruits, vegetables, and legumes. Governments could also tax foods high in sugar, salt, or saturated fats while improving purchasing power to make healthy diets affordable.
Willett added that many traditional plant-based diets already follow planetary health principles. “We are not prescribing a single global diet,” he said. “This approach respects cultural diversity and allows every region to eat well while protecting the Earth.”
