I can understand why used oil or doggie doo would be bad in the gutter, but what about grass clippings and leaves?
As grass clippings and leaves decompose, bugs and other decomposers use oxygen in the water. That leaves less oxygen for "good" bugs and fish. Before development, leaves and grass clippings did not get into the streams like they do today. Used oil should be recycled and doggie doo bagged and put in the trash.
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