Quote:
Originally Posted by 72c20customcamper
Yes . Rain pulls down pollution and small streams run into rivers .
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The NEW cars of the late 1980s and 1990s produced very little pollution.
Of course there were still tens of millions of older vehicles on the road at that time. It has taken a while for most of them to be off the road. Meanwhile the EPA has cranked standards from 95% to 99% pure
