NPR News: Rise In Smog In Western U.S. Is Blamed On Asia's Air Pollution

Rise In Smog In Western U.S. Is Blamed On Asia's Air Pollution
By tripling their emission of pollutants, Asian countries have contributed as much as 65 percent of a rise in ozone levels in the western U.S., scientists say.

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at March 3, 2017 at 10:21PM
Health & Science