Friday, July 29, 2005
Global dimming is a term describing the gradual reduction in the amount of sunlight observed reaching the Earth's surface since the 1950s. The effect varies by location but globally is of the order of a 5% reduction over the three decades 1960-1990; the trend has reversed during the past decade. Global dimming creates a cooling effect that may have led scientists to underestimate the effect of greenhouse gases on global warming."
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