Compare all the wasted food in the world to the world’s nations, and that pile of food would be the third largest emitter of greenhouse gasses in the world. It would also be roughly the size of China: That’s how much land is required to produce the amount of food we discard each year. For Dave Lewis, the CEO of international grocery-store chain Tesco and the chairman of Champions 12.3–a group of 40 leaders across the public and private sectors committed to reducing food waste by advancing the U.N. Sustainable Development Goal 12.3–those facts are reason enough for curbing the amount of food we discard without thinking. There’s also the fact that more than a billion tons of food goes unconsumed each year, while one in nine people across the world are malnourished.