In the 1970s, acid rain was one of the most serious environmental threats in North America and Europe. The air was so laden with pollution from coal power plants and cars at the time that it ...

Sulfur is rarely found pure in the ground. It is an impurity which is removed from fossil fuels because it causes acid rain when fossil fuels are burned.

transnational agreement spearheaded by the Environmental Protection Agency combatted acid rain, which greatly impacted the eastern portion of the continent. Earlier this month, EPA administrator ...