Think about this.
Water vapor is a far more effective green house gas than CO2. Water vapor is over 25 times more abundant in the atmosphere than CO2. If that's the case, then how could an increase in CO2 levels bring the world to a meltdown, but all that water vapor isn't?
Many global warming alarmists support development of full cells, but what are the environmentalists going to say when large numbers of fuel cell cars start appearing on the highways? Fuel cells release water vapor as their main waste product, which is a far more potent greenhouse gas. They use to support windpower as well, until it became a reality. Now they complain about all the birds being wiped out.