just read the article already noone is denying water vapor, but its not relevant because noone is realeasing it into the atmosphere, while co2 is > water vapor is the most important greenhouse gas overall, being responsible for 4167% of the greenhouse effect, but its global concentrations are not directly affected by human activity. while local water vapor concentrations can be affected by developments such as irrigation, it has little impact on the global scale due to its short residence time of about nine days. indirectly, an increase in global temperatures cause will also increase water vapor concentrations and thus their warming effect, in a process known as water vapor feedback.
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