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Use "water-vapor" in a sentence
"The scientists found: Stratospheric water-vapor concentrations decreased by about 10 percent after the year 2000 ..."
"If that is not enough, these upper-level westerlies are extremely dry, as indicated by the orange tint in the water-vapor imagery shown to the right."
"In fact, one of us (hint: not the blogger) recently published a paper estimating the magnitude of the water-vapor feedback exclusively from data -- no climate models involved."