Answers

2015-09-12T19:29:44+05:30
Harmful oxides of nitrogen & sulphur combine & react with water vapours,oxygen & other gases in atmosphere & fall on the earth along with rain as ACID RAIN
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2015-09-12T22:56:04+05:30
When sulpur dioxide and carbon dioxide goes and mixes with water vapour they become sulphuric acid and carbonic acid. they flow down with rain which is called acid rain.
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