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Vegetation mass that assembles wood, straw, corn cobs, biogas and biofuel: Wood energy presents 14% of the global energy consumption. Produced from the waste of forests and wood industries, it is burned to produce heat.
Biogas is produced by fermenting organic waste. Its combustion produces heat, but also generates electricity from cogeneration.
Biofuel comes from crops (sunflower, beet, rapeseed ...). Biodiesel (or methyl ester of vegetable oil), ethanol, and its derivative, ethyl tertiary butyl ether, ETBE are the most common ones. They are mixed with gasoline or diesel
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