In this video[1] from 1967 at 2:20 in they say that businesses downstream had to clean the water in order to use it. This does not make any sense. Why would companies downstream have to be responsible for cleaning the water polluted by companies upstream?? Is there any historical evidence of downstream companies trying to sue? Where there any legal property owners for the river?
[1] http://www.youtube.com/watch?v=_jxV6BbREfY
