Emissions from Asia put US cities over the ozone limit

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smog, china

Smog dans une rue de Linfen, dans la province chinoise du Shanxi©PETER PARKS / AFP

As plumes of pollution rise over the booming industrial towns of Asia, satellite data could help to alert people in other regions to the approach of drifting smog.

A team of researchers from the United States has conducted the first high-resolution analysis of ozone — the main constituent of smog — travelling from Asia to the western United States. The group’s findings, published last month in the Journal of Geophysical Research1, indicate that the contribution of Asian emissions to intercontinental pollution is higher than was previously believed.


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