What is Green Power?

Renewable energy resources such as solar, wind, geothermal, biogas, biomass and low-impact hydro generate green power. Not all sources of power generation share the same environmental benefits. As a result, green power is considered a subset of renewable energy and represents those renewable energy sources with the highest environmental benefit.

A green power resource produces electricity with zero anthropogenic (caused by humans) emissions, has a superior environmental profile to conventional power generation, and must have been built after the beginning of the voluntary market.

-- The Envionmental Protection Agency