Consider the following statements about Global Warming and identify the correct one........

Environment and Ecology Pollution

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Consider the following statements about Global Warming and identify the correct one

Being most potent greenhouse gas, Methane is the largest overall contributor to the global warming

Among non-human factors, water-vapour are biggest contributors to global warming.

Water-vapours have a life span of several hundred years in the atmosphere and hence act as a potent green house agent

Hydro-Fluoro-Carbons (HFC) are non-warming but deplete the ozone layer.

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Explanation:

First option is incorrect. Methane is not the largest overall contributor to the global warming.
Second option is correct. Among human factors, carbon dioxide is the largest contributor to global warming while among non-human factors, water vapour is the largest contributor.
Third option is incorrect i.e. Water-vapours have a life span of few hours after that they become part of water cycle.
Fourth option is incorrect. Hydro-Fluoro-Carbons (HFC) are part of greenhouse gases and they don’t deplete the ozone layer.
Other Greenhouse agents-
• Water vapor
• Carbon dioxide
• Methane
• Nitrous oxide
• Ozone
• Chlorofluorocarbons (CFCs)