ABSTRACT: To many people, the most familiar forms of renewable energy are the wind and the sun. But biomass (plant material and animal waste) is the oldest source of renewable energy, used since our ancestors learned the secret of fire. Until recently, biomass supplied far more renewable electricity or “biopower” than wind and solar power combined (Washington, 2008). If developed properly, biomass can and should supply increasing amounts of biopower. In fact, in numerous analyses of how many countries can transition to a clean energy future, sustainable biomass is a critical renewable resource (Rachel, 2009a). Biomass is a renewable energy source not only because the energy it comes from the sun, but also because biomass can re-grow over a relatively short period of time. Through the process of photosynthesis, chlorophyll in plants captures the sun"s energy by converting carbon dioxide from the air and water from the ground into carbohydrates complex compounds composed of carbon, hydrogen, and oxygen.