All rain is very slightly acid, but over the industrial areas of North America and Europe the rain is more acid because it absorbs waste gases which pollute the atmosphere.
Rainwater reacts with the carbon dioxide in the air to become a very dilute carbonic acid. This weak acid can dissolve limestone, which is an alkaline rock.
Rain can also react with the waster gases emitted into the air by factories, power stations and cars. Such gases may be carried great distances by winds and then fall as dilute sulfuric acid and nitric acid, often on areas far away from the source of pollution. This is called acid rain because its avidity is artificially high.
Acid rain increases at the erosion of rocks and building materials, especially limestone. Lakes and steams are slowly poisoned, threatening wildlife. The face of the statue shown in the photograph above has been eaten away by acid rain.
Rainwater reacts with the carbon dioxide in the air to become a very dilute carbonic acid. This weak acid can dissolve limestone, which is an alkaline rock.
Rain can also react with the waster gases emitted into the air by factories, power stations and cars. Such gases may be carried great distances by winds and then fall as dilute sulfuric acid and nitric acid, often on areas far away from the source of pollution. This is called acid rain because its avidity is artificially high.
Acid rain increases at the erosion of rocks and building materials, especially limestone. Lakes and steams are slowly poisoned, threatening wildlife. The face of the statue shown in the photograph above has been eaten away by acid rain.
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