The most abundant greenhouse gas in the earth's atmosphere is

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Water vapor is the most abundant greenhouse gas in the Earth's atmosphere, accounting for approximately 60% of the greenhouse effect. While other greenhouse gases such as carbon dioxide, methane, and nitrous oxide are also important, their concentrations in the atmosphere are much lower than water vapor. Chlorofluorocarbons, while they are potent greenhouse gases, have been largely phased out due to their damaging effects on the ozone layer.

The Most Abundant Greenhouse Gas in the Earth's Atmosphere Is