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Science Centric (10 Oct 2007 17:00 GMT) - A global-scale increase in surface humidity over the late twentieth century can be attributed mainly to human-induced global warming, reports a paper in Nature this week. The specific humidity is a measure of how much water vapour there is in a given volume of air. The water vapour content of the atmosphere is an important component of the Earth's climate system - affecting the distribution and maximum intensity of rainfall, the potential intensity of cyclones, and surface hydrology... [
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