10. 
    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 op http://www.encyclo.co.uk/local/20742
    
    
11. 
    Acid rain
    rain with a pH of around 4, in which pollutants such as sulphur dioxide have been dissolved.
    Found op http://www.energyinst.org.uk/education/glossary/
    
    
12. 
    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 ...
    Found op http://www.medterms.com/script/main/art.html?articlekey=24456
    
    
13. 
    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 op http://www.blackwellpublishing.com/Townsend/Glossary/GlossaryA.html
    
    
14. 
    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 an...
    Found op http://www.mondofacto.com/facts/dictionary?acid+rain
    
    
15. 
    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 op http://wordnetweb.princeton.edu/perl/webwn?s=acid%20rain
    
    
16. 
    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 op http://www.britannica.com/eb/a-z/a/12
    
    
17. 
    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 form...
    Found op http://www.encyclo.co.uk/visitor-contributions.php
    
    
18. 
    Acid rain
    Acid rain is a rain or any other form of precipitation that is unusually acidic, meaning that it possesses elevated levels of hydrogen ions (low pH). It can have harmful effects on plants, aquatic animals, and infrastructure. Acid rain is caused by emissions of carbon dioxide, sulfur dioxide and ni...
    Found op http://en.wikipedia.org/wiki/Acid_rain
    
    
19. 
    Acid Rain
    Rain with a pH less than 5.6. Normal pH of precipitation is 5.6.
    Found op http://www.physicalgeography.net/physgeoglos/a.html
    
    
20. 
    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 op http://www.encyclo.co.uk/local/21115
    
    
21. 
    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 op http://www.electromn.com/glossary/a.htm
    
    
22. 
    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 op http://www.daviddarling.info/encyclopedia/A/AE_acid_rain.html
    
    

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