Pollution that reaches all around the world, through the rain, is rather depressing, but I still appreciate you bringing it up.

Change the environment enough, by releasing enough of a new chencial and something bad is going to happen. That much have been obvious for at least decades. The fact that the exact bad things are not known until you've tried, isn't a reason to dump new chemicals until you find out.

I hope eventually it will be cleaned up, but it will take quite a shift in priorities from seeing and treating nature as externalities where costs can be dumped, to seeing it as the foundation for our existence.