WOW! This potentially is a catastrophe.

Just check this:

http://america.aljazeera.com/articles/2015/8/12/abandoned-mines-lack-crucial-cleanup-funding-source.html

Of course the US has the $ to deal with this problem.

We all remember the physical phenomenon of Quantitative Easing.

The US has to do this to save the drinking water of millions of its citizenry. If they do not, I say:

Buy shares in water bottling companies.