How Much Is U.S. to Blame for “Made-in-China” Pollution?

China has some of the dirtiest air in the world, but a large share of the country's pollutants are generated during the manufacture of goods destined for countries like the United States, according to a new study. (See related story: "Coal Burning Shortens Lives in China, New Study Shows.")

The research also found that by catching a lift on strong air currents, some of the emissions from China's manufacturing industry are making their way across the Pacific to contribute to smog in the western United States.  (See related "Pictures: A Rare Look Inside China's Energy Machine.")

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