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Air Pollution
BEIJING — Every day, monitoring stations across the city measure air pollution to determine if the skies above this national capital can officially be designated blue. It is not an act of whimsy: with Beijing preparing to play host to the 2008 Olympic Games, the official Blue Sky ratings are the city’s own measuring stick for how well it is cleaning up its polluted air.
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Air is 99.9% nitrogen, oxygen, water vapor and inert gases. It is the oxygen which our bodies require to live, in fact practically all life requires in as well.
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