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It's empty, it's dead, it's barren — you don't see animals, you smell them," he says.

For example, in Iowa, pigs currently outnumber people seven to one.

"We basically shove most animals into these massive sheds called confinements, where they never see a blade of grass."

He says where Iowa used to be made up of independent, middle-class family farms, it is now mostly families of low-wage workers employed by the mega-rich and often out-of-town agricultural barons.