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• Position: UPDATES - 3 days car ban in Beijing, China reduces nitrogen oxide pollution levels - Brief article

See "Greenhouse Car-Nations," May/June 2007, p. 32

Scientists report that a three-day car ban in Beijing, China, last November cut the city's nitrogen oxide pollution levels by up to 40 percent, a difference that was perceivable from space. The number of cars operating in the city dropped from 2.8 million to some 2 million...