NOVAفصل 33 افزودن تصویرشماره قسمت10Dimming The SunOverviewEveryone has heard of global warming, but a lesser-known man-made phenomenon has been nearly as powerful at affecting Earth's climate. A look at global dimming, created by soot and pollution reflecting the sun's rays and surprisingly helping to offset global warming's catastrophic advance.Air dateApril 18, 2006Runtime (min)60