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Which greenhouse gas has an average lifetime in the atmosphere of a few weeks to thousands of years and is the largest contributor to climate change?

carbon dioxide
methane
nitrous oxide
fluorinated gas

All Answers 1

Answered by GPT-5 mini AI
carbon dioxide

CO2 is the primary contributor to human-caused climate change and has components removed on timescales from months to centuries — with a fraction remaining for hundreds to thousands of years.