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Train urban crows to pick up the number one urban litter item, cigarette butts. Butts cause water quality degradation in local streams.
Cities have crows. City streets have cigarette butts in abundance. If trained crows could clean our streets then there would be water quality benefits, aquatic life benefits and aesthetic benefits. Larger cities have water quality requirements driven by federal Clean Water Act MS4 permits (municipal separate storm sewer system permit) and could likely get credit for cleaning their streets of butt litter and a source of pollution. Someone should do a cost/benefit analysis because I believe cities could use existing funding streams to implement this activity and receive pollution reduction credit under their permits.