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单词 acid rain
释义

acid rain


acid rain

n. Acid precipitation falling as rain.

acid rain

n (Environmental Science) rain that contains a high concentration of pollutants, chiefly sulphur dioxide and nitrogen oxide, released into the atmosphere by the burning of fossil fuels such as coal or oil

ac′id rain′


n. precipitation containing acid-forming chemicals, chiefly pollutants, that have been released into the atmosphere and combined with water vapor: ecologically harmful. [1855–60]

acid rain

Rain, snow, or other precipitation containing a high amount of acidity.Did You Know? We normally think of rain as something pure and natural, but in many parts of the world it is polluted with harmful acids from the moment it forms in the sky. How does this happen? When coal, gasoline, and oil are burned as fuels, they give off the gases sulfur dioxide and nitrogen oxide. In the atmosphere, these compounds combine with water vapor to form highly corrosive sulfuric and nitric acids. Prevailing winds carry these acids away from the industrial areas where they originate, and they fall to earth as acid rain. Acid rain is a serious environmental problem in parts of the world where there are many factories, power plants, and automobiles close together, as in parts of the United States, Canada, Europe, and Asia. It harms forests and soils and pollutes lakes and rivers, killing fish and other aquatic life. It can also damage buildings and monuments by eating away the stone and metal that they are made of.

acid rain


Rain acidified by sulfuric, nitric, and other acids that form when water and sunlight react with sulfur dioxide, nitrogen oxides and other pollutants released by burning fossil fuels. Acid rain can poison lakes, kill forests, and corrode buildings.
Thesaurus
Noun1.acid rain - rain containing acids that form in the atmosphere when industrial gas emissions (especially sulfur dioxide and nitrogen oxides) combine with wateracid rain - rain containing acids that form in the atmosphere when industrial gas emissions (especially sulfur dioxide and nitrogen oxides) combine with wateracid precipitationair pollution - pollution of the atmosphere; "air pollution reduced the visibility"
Translations
酸雨

acid rain

→ 酸雨zhCN

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 vegetation and aquatic life, and erode buildings and monuments. Automobile exhausts and the burning of high-sulfur industrial fuels are thought to be the main causes, but natural sources, such as volcanic gases and forest fires, may also be significant. It has been an increasingly serious problem since the 1950s, particularly in the NE United States, Canada, and W Europe, especially Scandinavia.

Acid rain became a political issue in the 1980s, when Canada claimed that pollutants from the United States were contaminating its forests and waters. Since then regulations have been enacted in North America and Europe to curb sulfur dioxide emissions from power plants; these include the U.S. Clean Air Act (as reauthorized and expanded in 1990) and the Helsinki protocol (1985), in which 21 European nations promised to reduce emissions by specified amounts. To assess the effectiveness of reductions a comprehensive study, comparing data from lakes and rivers across N Europe and North America, was conducted by an international team of scientists in 1999. The results they reported were mixed: while sulfates (the main acidifying water pollutant from acid rain) were lower, only some areas showed a decrease in overall acidity. It remained to be determined whether more time or a greater reduction in sulfur emissions was needed to reduce freshwater acidity in all areas. See air pollutionair pollution,
contamination of the air by noxious gases and minute particles of solid and liquid matter (particulates) in concentrations that endanger health. The major sources of air pollution are transportation engines, power and heat generation, industrial processes, and the
..... Click the link for more information. ; forestforest,
a dense growth of trees, together with other plants, covering a large area of land. The science concerned with the study, preservation, and management of forests is forestry.
..... Click the link for more information. ; pollutionpollution,
contamination of the environment as a result of human activities. The term pollution refers primarily to the fouling of air, water, and land by wastes (see air pollution; water pollution; solid waste).
..... Click the link for more information. .

Acid rain

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

[¦as·əd ′rān] (meteorology) Precipitation in the form of water drops that incorporates anthropogenic acids and acid materials.

acid rain

rain that contains a high concentration of pollutants, chiefly sulphur dioxide and nitrogen oxide, released into the atmosphere by the burning of fossil fuels such as coal or oil

acid rain


Precipitation laced with pollution, produced predominantly by power plants that burn coal of variable purity, generating SO2 and NO2, lowering the pH of precipitation

acid rain

any rain that contains pollutants such as dissolved sulphur compounds, and as a result adversely affects plant and animal life on precipitation. The pollutants are released into the atmosphere by the burning of fossil fuels such as coal or oil.

Acid Rain


Acid Rain

Precipitation with low pH, usually resulting from excessive sulfur or nitrogen oxides in the atmosphere. Acid rain is detrimental to both plant and animal life. It has become less common since the 1970s, when governments began to take steps to reduce the sulfur released into the air.

acid rain


Related to acid rain: greenhouse effect, global warming, Ozone depletion
  • noun

Synonyms for acid rain

noun rain containing acids that form in the atmosphere when industrial gas emissions (especially sulfur dioxide and nitrogen oxides) combine with water

Synonyms

  • acid precipitation

Related Words

  • air pollution
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更新时间：2024/11/11 18:59:40