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in Environmental Science by (144k points)

Which statement is correct regarding acid rain? 

I. The term “acid rain” was coined in 1972 by Robert Angus Smith 

II. Rainfall with pH less than 5.6 is called Acid rain. 

III. Acid rain is caused by a chemical reaction that starts when sulfur dioxide (SO2) and nitrogen oxides (NOX) are released into the air 

(a) I & II (b) Only II (c) II & III (d) All the above

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(c) Acid rain is a rain or any other form of precipitation that is unusually acidic, meaning that it possesses elevated levels of hydrogen ions (low pH). The term “acid rain” was coined in 1872 by Robert Angus Smith, after a link was established between sulfur dioxide (SO2) emissions from the burning of coal in Manchester and acidification of nearby rainfall. Rainfall with pH less than 5.6 is called Acid rain.

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