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:
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