A question about ducks. I had it repeated to me that we ought to get rid of all of the ducks in the river, because they poop in it and that's dirty. I tried to explain that the ducks were a sign that the river is healthy. When the river was very polluted, there were no ducks or geese. I explained about the sewage treatment plant, and how it sterilizes the water. But I couldn't answer the question about duck poop. I don't know if ducks poop in the river--maybe we shouldn't be blaming them for it, or trying to explain why it doesn't matter. Maybe they poop on the shore.
If this little item circulates, maybe duck poop will get the serious answer it deserves. It was a perfectly sensible question, and a reasonable concern. I just ran out of biology.
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