The Wuppertal Institute has studied how we can change our food habits to help the environment. They focused on improving what we eat in places like school cafeterias. By making small changes like choosing better ingredients, we can make a big difference. The study found that if schools and other public places start serving sustainable food, it can encourage people to eat better and help farmers who grow healthy food. But it's not just up to schools; everyone - including politicians, businesses, scientists, and everyday people - needs to work together to transform our food system. So, changing the way we eat can be good for both us and the planet.