"(Washington, DC) The Environmental Protection Agency is seeking to classify water vapor as a pollutant, due to its central role in global warming. Because water vapor is the dominant greenhouse gas in the atmosphere, accounting for at least 90% of the Earth's natural greenhouse effect, its emission during many human activities, such as the burning of fuels, is coming under increasing scrutiny by federal regulators.

Until now, the carbon dioxide produced during the burning of fuels has been the main concern. The extra carbon dioxide causes a manmade enhancement of the greenhouse effect. But water vapor is also produced by combustion of most fuels, as well as by industry and utilities that use water for cooling. The EPA would be able to regulate its manmade sources if it is classified as a pollutant.

EPA Director of the Department of Pollutant Decrees, Ray Donaldson, said, "Back before carbon dioxide was dangerous, we simply assumed that water vapor was also benign. But all reputable scientists now agree that the increased water vapor content of the atmosphere from such sources as burning of fuels and power plant cooling towers will also enhance the greenhouse effect, leading to potentially catastrophic warming." "

http://www.ecoenquirer.com/EPA-water-vapor.htm
[linked from http://www.junkscience.com/ -with a note: you have been warned]
I guess the next thing will be for humans to be labelled pollutants- it's bit surprising that human didn't make before water.