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Acid rain

Definition:

Falling rain (or snow) which has become acidic (pH less than 5.6) as a result of its combination with gaseous pollutants, such as sulphur dioxide (SO2) and nitrogen oxides (NOx).

Acid rain may cause acidification of surface waters, soils and ecosystems.

Source: GreenFacts

More:
Victims of acid rain - dead and dying Red Spruce in Maine Victims of acid rain - dead and dying Red Spruce in Maine

Source: Urban Options Acid Rain 

Related words:

Nitrogen oxides (NOx) - pH

Translation(s):

Español: Lluvia ácida
Français: Pluie acide
Nederlands: Zure regen

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