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Definition of Acid rain

Babylon English Dictionary

polluted rain that contains sulfur dioxide and nitrogen oxides which is caused by air pollution
Acid rain Definition from Business & Finance Dictionaries & Glossaries
Raynet Business & Marketing Glossary
is rain that is more acidic than normal. Caused by air pollution, acid rain’s spread and damage involves weather, chemistry, soil, and the life cycles of plants and animals on the land and from acid rain in the water. Air pollution from the burning of fossil fuels is the major cause of acid rain. Smoke and fumes from burning fossil fuels rise into the atmosphere and combine with the moisture in the air to form acid rain. The wet forms can fall as rain, snow, or fog. The dry forms are acidic gases or particulates.
Copyright © 2001, Ray Wright
Acid rain Definition from Social Science Dictionaries & Glossaries
Glossary of Sociology
The increased acidity of rainfall which is caused by emissions of sulfur dioxide and nitrogen oxides from power plants and automobiles.
Environmental Economics Glossary
The precipitation of dilute solutions of strong mineral acids, formed by the mixing in the atmosphere of various industrial pollutants -- primarily sulfur dioxide and nitrogen oxides -- with naturally occurring oxygen and water vapor.
Acid rain Definition from Science & Technology Dictionaries & Glossaries
EIA Energy Glossary
Also called acid precipitation or acid deposition, acid rain is precipitation containing harmful amounts of nitric and sulfuric acids formed primarily by sulfur dioxide and nitrogen oxides released into the atmosphere when fossil fuels are burned. It can be wet precipitation (rain, snow, or fog) or dry precipitation (absorbed gaseous and particulate matter, aerosol particles or dust). Acid rain has a pH below 5.6. Normal rain has a pH of about 5.6, which is slightly acidic. The term pH is a measure of acidity or alkalinity and ranges from 0 to 14. A pH measurement of 7 is regarded as neutral. Measurements below 7 indicate increased acidity, while those above indicate increased alkalinity.
Source: Energy Information Administration, 2006
Oil and Gas Field Glossary
Develops when sulphur oxides (SOx) and nitrogen oxides (NOx), released by the combustion of fossil fuels (particularly coal), combine with moisture in the atmosphere to form sulphurous, sulphuric, nitrous and nitric acids. Because SOx and NOx are gases and because the formation of acid rain takes tie, acid rain damage often occurs far from the source of the problem.
WEATHER&METEOROLOGY
Acid deposition - commonly called acid rain - is caused by emissions of sulphur dioxide and nitrogen oxides. Although natural sources of sulphur oxides and nitrogen oxides do exist, more than 90% of the sulphur and 95% of the nitrogen emissions occurring in eastern North America are of human origin. These primary air pollutants arise from the use of coal in the production of electricity, from base-metal smelting, and from fuel combustion in vehicles. Once released into the atmosphere, they can be converted chemically into such secondary pollutants as nitric acid and sulfuric acid, both of which dissolve easily in water. The resulting acidic water droplets can be carried long distances by prevailing winds, returning to Earth as acid rain, snow, or fog.
Technical English by wpv
Atmospheric precipitation with an pH below 5.6 to 5.7.
Glossary Of Geography
Rain that has become more acidic than normal (a pH below 5.0) as certain oxides present as airborne pollutants are absorbed by the water droplets. The term is often applied generically to all acidic precipitation.
Acid rain Definition from Encyclopedia Dictionaries & Glossaries
Wikipedia English - The Free Encyclopedia
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 sulfur dioxide and nitrogen oxide, which react with the water molecules in the atmosphere to produce acids. Governments have made efforts since the 1970s to reduce the release of sulfur dioxide into the atmosphere with positive results. Nitrogen oxides can also be produced naturally by lightning strikes and sulfur dioxide is produced by volcanic eruptions. The chemicals in acid rain can cause paint to peel, corrosion of steel structures such as bridges, and erosion of stone statues.

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Acid rain Definition from Society & Culture Dictionaries & Glossaries
EPA Glossary of Climate Change Terms
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 particulates. See acid deposition, sulfur dioxide, nitrogen oxides.
Provided as a public service by the U.S. Environmental Protection Agency. Reference list click here.
EPA Terms of Environment
(See: acid deposition.)
Provided as a public service by the U.S. Environmental Protection Agency
Environmental Engineering (English ver.)
Air pollution produced when acid chemicals are incorporated into rain, snow, fog or mist. The "acid" in acid rain comes from sulfur oxides and nitrogen oxides, products of burning coal and other fuels and from certain industrial processes. The sulfur oxides and nitrogen oxides are related to two strong acids- sulfuric acid and nitric acid. When sulfur dioxide and nitrogen oxides are released from power plants and other sources, winds blow them far from their source. If the acid chemicals in the air are blown into areas where the weather is wet, the acids can fall to Earth in the rain, snow, fog or mist. In areas where the weather is dry, the acid chemicals may become incorporated into dusts or smokes. Acid rain can damage the environment. human health and property.
rain with a pH of less than 5.6; results from atmospheric moisture mixing with sulphur and nitrogen oxides emitted from burning fossil fuels or from volcanic activity; may cause damage to buildings, monuments, car finishes, crops, forests, wildlife habitats, and aquatic life.
Acid rain Definition from Entertainment & Music Dictionaries & Glossaries
English to Federation-Standard Golic Vulcan
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Acid rain Definition from Language, Idioms & Slang Dictionaries & Glossaries
WordNet 2.0

Noun
1. rain containing acids that form in the atmosphere when industrial gas emissions (especially sulfur dioxide and nitrogen oxides) combine with water
(synonym) acid precipitation
(hypernym) air pollution