Water vapour emissions?

No.10995487 ViewReplyOriginalReport
I've always agreed that nuclear energy should be invested in and made into our primary source of energy (maybe even using thorium I guess?)

However, I recently came across a claim that water vapor is the most abundant greenhouse gas. Its nowhere near being as efficient as CO2 in the atmosphere when in identical quantities, but my question is, would nuclear energy make a huge impact regarding greenhouse gas emissions(water vapor). Please correct me if in wrong with anything as I am not very confident in my understanding of these topics.