Actually, this article is a good catch.

There is also a story today on generating electricity through methane digesters at dairy farms. Cow Poo Power. The farmers usually have a way to quickly hose out barning into a holding pond or tank. The slurry is then taken by tanker truck to spread on the crop fields where they are producing hay for the cows. The one hitch is, believe it or not, methane tanks are dangerous. There have been deaths by being overcome by methane gas.

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