CHICAGO -- A unique climate change fighting machine is being used to divert thousands of pounds of food waste from landfills, as well as feed people and heat city homes in a clean and sustainable way.

Biogas made from dairy and pig manure has long been an energy source non grata for environmental groups across the country. The fuel is touted by agribusiness, utilities and renewable natural gas ...

After San Luis Obispo County residents toss yard waste and food scraps into their green bin, the waste is transformed into renewable energy. San Luis Obispo County green waste travels from its green ...