The'global warming'is mainly due to (1)Increase in tropospheric O3 (2)Ozone Hole (3)Increase in CO2 (4)Increase in CO
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Explanation:
Both 3 & 4
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Answer: Increase in CO²
Explanation: If the level of CO² increases the air will become very hot and the average temperature will gradually increase a lot. This is what we call Global Warming.
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