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

Air pollutants generated in China during the manufacture of goods destined for export travel across the Pacific, contributing to U.S. smog.

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.")

In the study, detailed in this week's issue of the journal Proceedings of the National Academy of Sciences (PNAS), researchers led by Jintai Lin at Peking University in Beijing found that, in 2006 alone, about a fifth to a third of China's air pollutants—which include sulfur dioxide, nitrogen oxides, and carbon monoxide—were associated with the production of goods for export, and that about a fifth of those amounts were linked to

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