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" When the meat animals and the meat birds and almost all the fish species that humans had consumed died out, there was a great deal of hand-wringing, of course, and widespread recognition that maybe, just maybe, our own behavior had had something to do with it, that the diseases wouldn’t have spread so quickly if the creatures hadn’t been packed thousands upon thousands together in feedlots or in dark and poorly ventilated sheds, if science hadn’t been taken so aggressively to extremes to make each carcass uniformly productive, if the number of species hadn’t been so greatly reduced, in turn drastically reducing resistance to disease, or if antibiotics hadn’t been used so frequently and so thoughtlessly, quietly paving the way for the pandemics. "
― Don LePan , Animals