It’s true, though. Water causes roughly 30°C of global warming. We can’t get much if any more from water vapor, but there are several positive and negative feed

It’s true, though. Water causes roughly 30°C of global warming. We can’t get much if any more from water vapor, but there are several positive and negative feedbacks from clouds that are quite interesting. High clouds are ice, which allow transmission of visible light, but absorb in the infrared. Water is to rain as CO2 is to glucose.