NORFOLK, Va. — Acid rain is a serious environmental problem caused by air pollution. It forms when sulfur dioxide and nitrogen oxides are released into the atmosphere, mainly from burning fossil fuels ...

Acid rain is a very broad term. It encompasses not only rain but also other forms of precipitation including fog, hail, sleet, snow, dust, and gas. It can even cause haze or smog, contributing to the ...

Acid rain has been greatly reduced but tons of toxis still drift down each year. MARCH 4, 2013— -- Acid rain commanded as much attention in the 1990s as global warming or the hole in the ozone ...

The United States could see the return of toxic acid rain, an environmental problem thought to have been solved decades ago, due to the White House's rollback of pollution protections, according to an ...