evidence: Water vapor may be the most abundant GHG keeping the planet habitable, but it is not a major driver of long-term climate change and the recent global warming we are experiencing. It is incorrect to claim that because water vapor is natural and the greenhouse effect is natural, recent global warming must be natural. Water vapor is fundamentally different from the other GHGs which directly cause global warming. It has a negligible ERF, it leaves the atmosphere in a matter of days, and it is ultimately governed by temperature rather than human emissions. It is more of a consequence of global warming than a cause. We already know beyond any reasonable doubt that anthropogenic emissions of the other GHGs like CO2, methane, and nitrous oxide, is the primary cause of global warming. Water vapor is not relevant when it comes to the enhanced greenhouse effect in the context of recent global warming.