A cadre of government and commercial aircraft helped collect data for a new study linking an increase in springtime ozone levels in western North America with pollutants drifting eastward from overseas, including Asia. (Courtesy: NOAA)
COLORADO (US)—Springtime ozone levels above western North America are rising primarily due to air flowing eastward from the Pacific Ocean, a trend that is largest when the air originates in Asia. Continue…
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