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August 30, 2006



Global Dimming

Global dimming is the gradual reduction in the amount of global hemispherical irradiance (or total solar irradiance) at the Earth's surface, observed since the beginning of systematic measurements in 1950s. The effect varies by location, but worldwide it is of the order of a 5% reduction over the three decades from 1960–1990. This trend has reversed during the past decade. Global dimming creates a cooling effect that may have partially masked the effect of greenhouse gases on global warming.

and there's lots more!

Cool! Literally.

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