Chinese Schools Found a Way to Make Cafeteria Food Waste Actually Useful

[00:00:00]Almost every school cafeteria across China has a machine that eats leftover food. Instead of throwing scraps away, students dump their leftovers straight into the machine. First, it crushes the food into a thick slurry, then separates the oil from the water, which is super important because that oil is later used to make [music] biodiesel. Whatever's left gets fermented with bacteria and slowly broken down into compost.