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question_answer1) Why does rain water normally have a \[pH\] of about 5.6? When does it become acid rain?
question_answer2) Why is acid rain considered as a threat to Taj Mahal?
question_answer3) Fish do not grow as well in warm water as in cold water. Why?
question_answer4) "Oxygen plays a key role in the troposphere while ozone in the stratosphere". Elucidate.
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