Acid deposition: A complex chemical and atmospheric phenomenon that occurs when emissions of sulfur and nitrogen compounds and other substances are transformed by chemical processes in the atmosphere and then deposited on earth in either wet or dry form. The wet forms, popularly called acid rain, can fall to earth as rain, snow, or fog. The dry forms are acidic gases or particulates.
Acid deposition is a growing danger with industry booming throughout the world. What acid deposition is, its many forms, including why it occurs, how it affects the earth ...
Acid rain, mist and fog ... Acid deposition is a general name for a number of phenomena, namely acid rain, acid fog and acid mist.
The National Environmental Policy Act of 1969 (NEPA) The chemistry of the atmosphere is changing in many ways. The National Environmental Policy Act of 1969 established ...
During the early 1980s and 90s, dramatic visions of acid precipitation corroding buildings and killing trees captured the minds of the public. Since then, the threat of ...
EPA Acid Rain website. Schematic of acid deposition sources, transport, and receipt.