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A single 50,000 acre hog farm, one hog farm,
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can produce more waste than the entire city of Los Angeles,
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so you see how this is contributing.
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Animal waste outnumbers human waste by a factor of 130.
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The amount of manure then that's produced
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just by livestock in the U.S. per American citizen,
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so per you, every citizen here,
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there's three tons of manure generated.
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The impact on the environment is considerable,
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and a lot of concern about how the pathogens in these things move
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through air, and water, and movement of human beings.
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Here's some statistics that show