When food is wasted, so are the natural resources and wildlife sacrificed to our food system — and we waste a lot of food. Read our report on food waste in grocery stores: "Checked Out: How U.S.

The gas from the food waste is then piped across the street to a new compressed natural gas, or CNG, station. Types of biofuels There are three main categories of biofuels: Ethanol, which is made ...