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प्रश्न
What is acid rain?
थोडक्यात उत्तर
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उत्तर १
Acid rain is the term for pollution caused by sulphur and nitrogen dioxide when they combine with atmospheric moisture.
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उत्तर २
Acid rain: Oxides of sulphur [S02] and nitrogen [N02] present air mix with water [or snow, fog etc.] and fall down on the earth resulting in acid rain.
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