> Water vapor is the most potent greenhouse gas owing to the presence of the hydroxyl bond which strongly absorbs in the infra-red region of the light spectrum.

> Water vapor is the most potent greenhouse gas owing to the presence of the hydroxyl bond which strongly absorbs in the infra-red region of the light spectrum. [1] Though I can't tell whether water vapor created at the surface has the same effect as water vapor at altitude. [1] https://en.wikipedia.org/wiki/Water_vapor https://en.wikipedia.org/wiki/Water_vapor