“In my papers over there,” he said, “you can find historical reports of great sums being spent on incinerators to burn up sewage sludge. Their designers boasted of relatively smog-free stacks. We were of course accused of ‘sewer socialism,’ like our Milwaukee predecessors. Nonetheless, we constructed a national system of sludge drying and natural fertilizer production. After seven years we were able to dispense with chemical fertilizers entirely. This was partly through sewage recycling, partly through garbage composting, partly through reliance on some novel nitrogen-fixing crops and crop
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