In this process of mining rocks, nutrients like calcium and silicate flow into nearby streams, improving the water pH.

Acid rain is a term that refers to not just rain but also other forms of precipitation such as snow, hail, sleet, and fog that has a higher acidity than normal. Acid rain is caused by the burning of ...

As pollution and sulfuric acid choked North American skies in the 1970s and 80s, a bipartisan, transnational agreement spearheaded by the Environmental Protection Agency combatted acid rain, which ...