Two Types of Trees

September 21st, 2004

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If you stand on the steps of the U.S. Capitol Building and look two miles due west, you can see the Lincoln Memorial.  Two miles is the same distance the Gobi Desert in central China creeps toward Beijing every year (it is now less than 200 miles away).  Sandstorms now buffet the city every summer, sending particles drifting as far as South Korea.  Air pollution is so bad that breathing Beijing’s air is the equivalent of smoking two packs of cigarettes a day.

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