Acid rain

Rainwater that has an acidity content greater than the postulated natural pH of about 5.6. It is formed when sulfur dioxides and nitrogen oxides, as gases or fine particles in the atmosphere, combine with water vapor and precipitate as sulfuric acid or nitric acid in rain, snow, or fog. The dry forms are acidic gases or particul...

acid rain

Acidic precipitation thought to be caused mainly by the release into the atmosphere of sulphur dioxide (SO2) and oxides of nitrogen (NOx), which dissolve in pure rainwater making it acidic. Sulphur dioxide is formed by the burning of fossil fuels, such as...
Found on http://www.talktalk.co.uk/reference/encyclopaedia/hutchinson/m0010215.html

Acid Rain

Acid rain is polluted and harmful to the environment. Acid rain has a low pH. Acid rain may have been a component of the K-T extinction.
Found on http://www.enchantedlearning.com/subjects/dinosaurs/glossary/

Acid Rain

Rainwater that contains sulfur dioxide and other pollutants from industrial plants. There has been considerable damage done to the forests of the US and Canada.
Found on http://www.encyclo.co.uk/local/20077

Acid Rain

(See acid deposition.)
Found on http://www.epa.gov/OCEPAterms/

Acid Rain

Rain that is more acidic than normal precipitation because water vapour has condensed on to particles of sulphate or nitrogen oxide.
Found on http://www.bbc.co.uk/weather/weatherwise/glossary/a.shtml

acid rain

[n] - rain containing acids that form in the atmosphere when industrial gas emissions (especially sulfur dioxide and nitrogen oxides) combine with water
Found on http://www.webdictionary.co.uk/definition.php?query=acid%20rain

Acid rain

precipitation that is made acidic by air pollution and destroys plant and animal life
Found on http://wps.pearsoned.co.uk/wps/media/objects/2143/2195136/glossary/glossary

Acid rain

Rain containing sulphuric acid and nitric acid.
Found on http://www.encyclo.co.uk/local/20442

Acid rain

Commonly used to mean the deposition of acidic components in rain, snow, fog, dew, or dry particles. The more accurate term is acid precipitation. Clean or unpolluted rain has a slightly acidic pH of 5.6, the extra acidity in rain comes from the reaction of air pollutants, primarily
Found on http://www.encyclo.co.uk/local/20453

Acid Rain

Atmospheric drops combine with a range of chemical pollutants such as carbon and sulphur dioxide to form rain, mist or snow that is more acid than normal. It can cause damage to plants many thousands of kilometres away from where it formed.
Found on http://www.epaw.co.uk/EPT/glossary.html

Acid Rain

Rain that is weakly acidic due to pollution. The pollution can be from the burning of coal in power stations or from car exhausts. See also: Acid, Erosion, Weathering.
Found on http://www.diracdelta.co.uk/science/source/a/c/acid%20rain/source.html

acid rain

Atmospheric precipitation with a pH below 3.6 to 5.7. Burning of fossil fuels for heat and power is the major factor in the generation of oxides of nitrogen and sulfur, which are converted into nitric and sulfuric acids washed down in the rain. See also atmospheric corrosion.
Found on http://www.encyclo.co.uk/local/20742

Acid rain

rain with a pH of around 4, in which pollutants such as sulphur dioxide have been dissolved.
Found on http://www.encyclo.co.uk/local/20796

Acid rain

Acid rain: Rain resulting from the combination of fossil fuel emissions and water in the atmosphere. The environmental effects of acid rain include the acidification of lakes and streams, damage to trees at high altitude, the acceleration of decay in buildings and poorer air quality. Acid rain also poses serious human health risks by contributing t...
Found on http://www.medterms.com/script/main/art.asp?articlekey=24456

Acid rain

Rain with a very low pH (often below 4.0) resulting from emissions to the atmosphere of oxides of sulfur and nitrogen.
Found on http://www.blackwellpublishing.com/Townsend/Glossary/GlossaryA.html

acid rain

<biology, plant biology> This is rain which has turned acidic because of the presence of sulphur or nitrogen oxides (both created from burning coal and other fossil fuels) in the atmosphere. Acid rain is a serious environmental problem, it can kill trees and harm plants and animals in lakes and ponds. ... (09 Oct 1997) ...
Found on http://www.encyclo.co.uk/local/20973

acid rain

acid precipitation noun rain containing acids that form in the atmosphere when industrial gas emissions (especially sulfur dioxide and nitrogen oxides) combine with water
Found on http://wordnetweb.princeton.edu/perl/webwn?s=acid%20rain

acid rain

form of precipitation containing a heavy concentration of sulfuric and nitric acids. The term is also commonly applied to snow, sleet, and hail that ... [10 related articles]
Found on http://www.britannica.com/eb/a-z/a/12

Acid Rain

Rain with a pH less than 5.6. Normal pH of precipitation is 5.6.
Found on http://www.physicalgeography.net/physgeoglos/a.html

acid rain

Atmospheric precipitation with a pH below 3.6 to 5.7. Burning of fossil fuels for heat and power is the major factor in the generation of oxides of nitrogen and sulfur, which are converted into nitric and sulfuric acids washed down in the rain. See also atmospheric corrosion
Found on http://www.encyclo.co.uk/local/21115

Acid Rain

A term used to describe precipitation that has become acidic (low pH) due to the emission of sulfur oxides from fossil fuel burning power plants.
Found on http://www.electromn.com/glossary/a.htm

acid rain

Also called acid precipitation or acid deposition, a precipitation containing harmful amounts of nitric and sulfuric acids formed primarily by nitrogen oxides and sulfur oxides released into the atmosphere when fossil fuels are burned. It may be wet precipitation (rain, snow, or fog) or dry precipit...
Found on http://www.daviddarling.info/encyclopedia/A/AE_acid_rain.html

acid rain

acid rain or acid deposition,form of precipitation (rain, snow, sleet, or hail) containing high levels of sulfuric or nitric acids (pH below 5.5–5.6). Produced when sulfur dioxide and various nitrogen oxides combine with atmospheric moisture, acid rain can contaminate drinking water, damage ve...
Found on http://www.infoplease.com/ce6/sci/A0802334.html

Acid rain

When strong acids fall from the atmosphere in the form of rain, snow, fog or dry particles. The acid is the result of pollution caused mostly by sulphur oxides and nitrogen oxides that are discharged into the atmosphere by industry. It also is created by burning coal and oil, from the operation of smelting industries and from transportation. In the...
Found on http://www.encyclo.co.uk/local/21291
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