LMFAO!! Are you serious? Steam from cooling towers? And just how much water vapor from cooling towers is introduced into the earth's atmosphere as as percentage of the total water vapor in the atmosphere as compared to the amount introduced from the evaporation of ocean water? Is it 0.00000000000000000001%? You must have a number since you brought it up.
Please don't misunderstand. My point is refuting the proposition that nuclear plants produce NO greenhouse gases. Water, in whatever atmospheric form, is reported by those who know to be the predominant greenhouse gas in the Earth's atmosphere.
Of course the output of cooling towers is not even a small fraction of what evaporates from the oceans.