My house still sits in a forest - and that decision saves a ton of $ on utility bills and lawn care. 
The question was "drastic environmental change plus pollution and a positive outcome".
I am not saying that we can never change anything, just asking for an actual POSITIVE example of man-made changes that caused pollution and had a long-term positive outcome because I couldn't think of one offhand.

The question was "drastic environmental change plus pollution and a positive outcome".
I am not saying that we can never change anything, just asking for an actual POSITIVE example of man-made changes that caused pollution and had a long-term positive outcome because I couldn't think of one offhand.



