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BUT when the sewage treatment plants are "cleaned" or the bottoms "lowered" they call that "Sludge", and that can be sold for fertilizer.......And that stuff is potent, BUT harmful, to the ground where it is, as it puts heavy metal concentrate into the ground not only the nitrogen and other minerals the ground needs to grow crops,...... They have recently outlawed its use here in New Hampshire for that very reason as some of the small local farmers (notice I said "small" here) had bought it and found it seeping into the local river, and killing the fish as the high metal content was highly present in the water and in the ground around it and it just started a chain reaction and thats how they found what it does to the ground!
