Scientists and regulators are divided over the threat posed by rising levels of a chemical called TFA.

It’s a remarkable turnaround in since acid rain’s discovery in the U.S. by a young professor at Dartmouth College named Gene ... to measure rain as unadulterated by human activity as possible.

opinion Commentary. We humans restored the ozone layer and defeated acid rain, we can solve climate change The good news is that we've been here before and we know how to fix things - if we want to.

The Acid Rain Program, fully implemented under the Clean Air Act in 2010, aims to reduce these effects by regulating the output of sulfur dioxide and nitrogen oxide emissions from power plants.

Acid rain is likely to fall from the skies in Hawaii over the next few days — but scientists say it won't be harmful and is far from the main volcano hazard residents should worry about. And vog ...

When active, Kīlauea pumps out thousands of tons of volcanic gases, namely water vapor, sulfur dioxide, and carbon dioxide.