Plants use photosynthesis to capture the sun’s energy, and this energy is stored as they grow, providing a well of bio-energy. Bio-energy comes from trees and crops grown for their energy content. It also comes from by-products such as sewage, straw, manure, animal and vegetable fat, and general rubbish. These energy sources are referred to as biomass feedstocks.
Biomass can be burned to produce heat, and this heat can be used directly or used to generate electricity. Biomass can also be turned into biofuels that act as substitutes for fossil fuels.
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