A global solution for nutrition and climate
By 2050, everyone could have access to nutritious, culturally appropriate food while reducing environmental damage. The 2025 EAT-Lancet Commission on Healthy Diets From Sustainable Food Systems presents a “planetary health diet” as a path to achieve this.
The report shows that combining this diet with sustainable farming practices and reduced food waste could feed 9.6 billion people fairly. Experts from over 35 countries contributed, showing that global food-related greenhouse gas emissions could fall by more than half if nations act together.
Currently, roughly 30% of emissions come from producing, processing, and transporting food, with the rest mostly from fossil fuels and deforestation for farmland.
Key components of the planetary health diet
The diet emphasizes fruits, vegetables, whole grains, legumes, and nuts. It allows moderate meat and dairy while limiting added sugar, salt, and saturated fats. “This diet protects both human health and the planet,” said Dr. Walter Willett of Harvard University.
He recommends one daily serving of dairy and one serving of animal protein, such as fish, poultry, or eggs. Red meat, including beef and pork, should be limited to a 4-ounce serving once a week. “It’s flexible, balanced, and similar to the Mediterranean diet,” Willett said.
Beyond personal food choices
Johan Rockström, co-chair of the commission and director of the Potsdam Institute for Climate Impact Research, said diet alone will not solve the problem. “We also need to reduce food waste and adopt sustainable land, water, and ecosystem management,” he explained. “Healthy food must be accessible and affordable for all.”
Opposition from industries and misinformation
The 2019 EAT-Lancet report estimated that global adoption of the planetary health diet could prevent 11.6 million premature deaths annually. The 2025 update raises that figure to 15 million. In the U.S., about 31% of premature adult deaths could be avoided.
Transforming the food system could save $5 trillion annually by cutting health costs, restoring ecosystems, and slowing climate change. The required investment — $200 to $500 billion — is small compared to the potential benefits.
Resistance has emerged, particularly from meat and dairy industries. Campaigns like #YestoMeat spread misinformation in 2019, and similar tactics have resurfaced. “Some groups promote meat-heavy diets while downplaying livestock’s climate impact,” Willett said. “Our report relies on independent, global scientific evidence.”
The consequences of inaction
If current practices continue, agricultural emissions could rise by 33% by 2050. Nearly 70% of ecosystems have already lost over half of their natural areas, mostly due to farming.
The planetary health diet could reduce food-related emissions by 60% compared with 2020 levels. Cattle numbers would fall by 26%, freeing 11% of grazing land. “This could prevent further deforestation in the Amazon,” Willett said.
Meanwhile, aquatic food production could rise by 46%, vegetables by 42%, fruits by 61%, nuts by 172%, and legumes by 187%. Global food prices could drop about 3%.
Building a fair and sustainable food system
Christina Hicks of Lancaster University said the richest 30% of people cause more than 70% of food-related environmental damage. Fewer than 1% currently meet their food needs without harming 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 emphasized that many traditional plant-based diets already align with planetary health principles. “We are not prescribing one global diet,” he said. “This approach respects cultural diversity and helps every region eat well while protecting the Earth.”
