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On a regular farm, the manure goes back of the fields that grow the food for the livestock.
The factory farms produce an order of magnitude more manure and has no land to spread it on, because the livestock feed is grown elsewhere.
Shipping the manure to where the livestock feed is grown, is much more expensive than using chemical fertilizer made from oil.
The bottom line take priority over the environment.
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The descent of man ~ Nixon, Friedman, Reagan, Trump.
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