5 percent of American 's leftovers could feed 4 million people for 1 day . It is the exact process , in fact , which goes on in landfills . Comment: Rotting food releases methane , a more potent greenhouse gas than CO2 . Methane can be harnessed to create clean energy for heat , light and fuel .
5 percent of American 's leftovers could feed 4 million people for 1 day . Comment: Rotting food releases methane , a more potent greenhouse gas than CO2 . Methane can be harnessed to create clean energy for heat , light and fuel .