My environmental policy would be: “You must clean up the mess you make.”
Kinda like the doppers DIDN’T do in the san fran smoke out on 4/20? I heard they left 15,000+ pounds of trash behind. Guess they were too stoned to remember to pick up all the pizza boxes and tater chip bags.
Make all cities place the Intake for their municipal water system one mile downstream of the Discharge of the city's sewage system. (Yea, I know you'd be fighting gravity a bit more with the pumping)
"Put it back into the river as clean or cleaner than you took it out!"
It would turn most of the citizens into environmental watchdogs! Beginning with what they dump down their own drains.