Alternative and Sustainable Energy Sources: Biodiesel and Biomass Fuels
Prairie Eco-Thrifter
JANUARY 15, 2012
Cows give off large amounts of methane gas as part of their digestive process, a fact that is criticized by environmentalists who cite it as a major cause of global warming. If the methane gas could be collected, it could be used as an energy source. Biofuels . Several factors have lead to increasing interest and research in biofuels.
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