Definition of acid deposition
A Closer Look
Acid deposition-usually referred to simply as acid rain-actually includes two forms of pollution, wet and dry. When fossil fuels such as coal, gasoline, and oil are burned, they release the gases sulfur dioxide and nitrogen oxide. In the wet type of acid deposition, these compounds combine with water vapor in the atmosphere to form highly corrosive sulfuric and nitric acids. Prevailing winds carry the acids away from the industrial areas where they originate, and they fall to earth as rain, snow, or fog. In the dry type, the prevailing winds deposit acidic gases and particulate matter on objects in the open such as buildings, vehicles, and trees. When rain washes away this acidic matter, the runoff is even more acidic than the rainwater. Acid deposition is a serious environmental problem in parts of the world with a high density of factories, power plants, and automobiles, including much of the United States and Canada, as well as areas of Europe and Asia. It harms forests and soils and pollutes lakes and rivers, killing fish and other aquatic life. It also affects human health, contributing to respiratory diseases such as asthma and emphysema. Many scientists believe that some environmental damage caused by acid deposition could take years, even decades or centuries, to repair. Acid deposition can also damage historic buildings and monuments by corroding the stone and metal of which they are constructed. Individual and societal efforts to reduce acid deposition involve many interrelated social, economic, and political factors.
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How to use acid deposition in a sentence
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Eggs, he says, are a good source of cysteine, an amino acid that helps the liver break down alcohol faster.
This at-home blood test kit gives a full reading of antioxidant, fatty acid, or vitamin panels.
The recent spate of acid attacks on women is only the latest manifestation of this dangerous trend.
There are a number of bacilli, called acid-fast bacilli, which stain in the same way as the tubercle bacillus.
The amount of the other purin bodies together is about one-tenth that of uric acid.
Uric acid is decreased before an attack of gout and increased afterward, but its etiologic relation is still uncertain.
An increase is also noted in the uric-acid diathesis and in diseases accompanied by respiratory insufficiency.
Indol is absorbed and oxidized into indoxyl, which combines with potassium and sulphuric acid and is thus excreted.