Search Results for: Vegetable residues used in animal feeding
oils , animal fats , and animal manure. by contrast, fossil fuels , such as coal and petroleum , are derived from long-dead biological materials that have been transformed by geological processes. in principle, biofuels can be obtained from any biological carbon source, but the most common sources are
the name discol. after the war, inexpensive oil from the middle east contributed in part to the lessened economic and geopolitical interest in biofuels. then, in and , geopolitical conflict in the middle east caused opec to cut exports, and non-opec nations experienced a very large decrease in oil supply...
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