If you have too much corn, you try to find a way to use it for fuel. If you have lots of cows, you do the same thing.
Cow manure, waste silage, cheese whey are waste products to some, but viable energy sources to researchers in New York State who are helping area dairy farmers meet their own energy needs by turning these waste products into "biogas" (and this is NOT the kind of gas expelled by cows).
Researcher Stefan Grimberg says, "Biogas derived from the anaerobic digestion of manure and whey represents an important biofuel that could provide significant economic, environmental and social benefits at thousands of farms." In other words, dairy farms could be almost totally self-sufficient, if cows could produce the power needed to run tractors and other farm machinery. Farmers might even be able to derive extra income from selling excess biofuel.
Art credit: freeimages.co.uk
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