Globally, about a third of our food goes to waste. In the U.S., most food waste ends up in landfills, left to decompose and produce methane. A new study in the journal Environmental Science and Technology shows that as the rest of the world starts to eat more meat-heavy, American style diets, there will be even more food waste. A new California law went into effect last week that requires that large apartment buildings and businesses like supermarkets and restaurants to recycle organic waste. That includes food waste.