The problem with our urban watersheds is that they connect to our sewers. eventually they overflow into the ocean. Perfectly good water is being dumped into the ocean, and being mixed with other unsavory types of things. We end up using water that could be used for other useful things, and since our sewage and storm drain pipes are connected, flooding happens in some areas as well. Since we live in a city, all the water ends up just hitting the concrete.
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