I wonder… I mean of course it’s easy to imagine rivers going through large cities being dirty. But my understanding is most large cities do not dump sewage into

I wonder… I mean of course it’s easy to imagine rivers going through large cities being dirty. But my understanding is most large cities do not dump sewage into rivers except in cases of major flooding. And there’s also stuff like New York putting in all those clams to clean up a river or… something like that anyways.