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date: 09 July 2020

acid rain 

Source:
A Dictionary of Agriculture and Land Management
Author(s):

Will Manley,

Katharine Foot,

Andrew Davis

Rainwater that has a pH below 5.6 can be considered as acid rain. Natural rainwater normally has a pH of about 5.6, i.e. very slightly acidic under normal circumstances due to carbon dioxide in the air forming carbonic acid, which is a weak acid. However, increasing levels of atmospheric carbon dioxide are mainly responsible for the increased levels of acidity in rainwater, thus lowering the pH. Acid rain has many damaging environmental effects, including acidification of oceans and lakes, which can impact on biodiversity, degradation of soils, and erosion of building materials such as limestone and marble. ... ...

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