According to the United Nations Environmental Program, 19% of food available to consumers globally was wasted in 2022.Fertnig/Getty ImagesSome kitchens are turning to AI to monitor how much food they're wasting.AI company Winnow tracks food waste going into the trash using a motion-sensor camera and scales.Hilton has been using Winnow to reduce waste at its breakfast buffets by serving smaller portions of croissants, fruit, and salmon.Hotels are reducing how much food they waste at their breakfast buffets by installing AI-powered cameras above their kitchen trash cans.British company Winnow's hardware involves a scale that kitchens place a trash can on, as well as a screen with a motion-sensor camera.