Acid rain describes any form of precipitation that contains high levels of nitric and sulfuric acids. It can also occur in the form of snow, fog, and tiny bits of dry material that settle to Earth.

Depleted ecosystems, dwindling forests, contaminated drinking water and toxic soil. All due to what Canada's Environment Minister John Roberts called in 1980 "the most serious environmental threat to ...

There are four basic types of precipitation we see in the winter - rain, freezing rain, sleet and snow. The type of precipitation we see is caused by the difference in temperature between the base of ...