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1970s: United States: raw sewage in container. Breakdown of raw sewage. Life forms under microscope. Ammonia and nitrogen in system

   

1970s: United States: raw sewage in container. Breakdown of raw sewage. Life forms under microscope. Ammonia and nitrogen in system

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1970s: United States: raw sewage in container. Breakdown of raw sewage. Life forms under microscope. Ammonia and nitrogen in system