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. Instead of being made from oil, biofuels are made from organic or plant material.
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