Acid Rain's Dirty Legacy

Brooks Miner, reporting for FiveThirtyEight:

Acid rain was rare among environmental problems in that it had a viable solution, and these days it’s often hailed as an environmental success story. The market worked as intended, sulfur and nitrogen emissions declined and rain became less acidic. And just two weeks ago, the U.S. Supreme Court issued a decision upholding the federal government’s authority to regulate power plants in this manner.

But what about the lakes and streams that were already so acidic? Nearly 25 years since those changes to the Clean Air Act, water bodies in the Northeast have recovered, while those further south have not.
Flickr - Rainforest Action Network

Flickr - Rainforest Action Network

Decrease the burden on lakes affected by past emissions, lower pollution in the present would.