The UN’s Food and Agriculture Organization estimates that roughly one-third of the food produced for human consumption around the world every year gets lost or wasted. In the process, precious resources like water and land vanish--and the greenhouse gas emissions produced in manufacturing this wasted food further contribute to climate change. Stockholm-based Karma makes an app that connects people with local restaurants, cafes, and grocery stores that have perfectly good, yet unsold food. Karma users can buy the surplus food at half price and collect it just as they would takeout. The retailers, meanwhile, can earn up to $56,000 a year in additional revenue–all from food they would have thrown out. Currently 1,500 retailers sell their surplus food through Karma and over 400,000 app users buy food at half price in more than 150 cities.