We have talked about food waste before. It is a big problem in this country: some 31% of our food supply is wasted, more than 130 billion pounds a year. Food waste makes up 21% of solid waste in municipal landfills, which means that it accounts for the bulk of landfill methane emissions. Methane is more than 20 times more effective as a greenhouse gas than carbon dioxide, and landfills are a major source of it.
