Category Archives: USA & Canada

Large trucks are biggest culprits of near-road air pollution

A new study reveals large diesel trucks to be the greatest contributors to harmful black carbon emissions close to major roadways, indicating that vehicle types matter more than traffic volume for near-road air pollution. For the 30 per cent of … Continue reading

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Pollutionwatch: summer’s deadly wildfires cause pollution worldwide

Widespread wildfires have taken lives and destroyed habitats as well as causing air pollution Wildfires are spanning the northern hemisphere. Local impacts have been severe; notably the loss of habitat and life, including the tragic deaths in Greece. Smoke has caused … Continue reading

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Seattle and Portland Air is Now Dirtier Than Most Polluted Cities in Asia

For now, two of America’s cleanest cities have dirtier air than the the most polluted cities in Asia. IN THE DAMP and dreary Pacific Northwest, where moss climbs the trees and moisture dribbles down lamp posts and seems to seep through … Continue reading

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Wildfires’ smoke gets even worse, prompting B.C. to elevate health-risk warnings for Metro Vancouver to highest levels

Metro Vancouver’s air quality continues to deteriorate as smoke from dozens of serious wildfires remains over the area. This afternoon (August 21), the province revised values for the region’s Air Quality Health Index, elevating health-risk levels from eight and nine … Continue reading

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Tweets prove to be reliable indicator of air quality conditions during wildfires

Tweets originating in California during the state’s 2015 wildfire season suggest that social media can improve predictions of air quality impacts from smoke resulting from wildfires and have the potential to improve rescue and relief efforts, according to research by … Continue reading

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Fire-choked Yosemite has dirtier air than Beijing

A major wildfire burning on the western edge of Yosemite National Park has generated so much smoke that air pollution levels in Yosemite Valley are worse than in Beijing, one of the world’s most polluted cities. At the height of … Continue reading

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US national parks have just as much air pollution as major cities

Study finds that the air in areas such as Yosemite National Park isn’t as pristine as it seems. The air in US national parks contains just as much ozone pollution as the air in many of the country’s largest cities, … Continue reading

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Wildfires are making extreme air pollution even worse in the northwest U.S.

Smoke from blazes ravaging western states is counteracting clean air improvements The northwestern United States has become an air pollution hot spot — literally. Air quality in states from Nevada to Montana is worse than it was 30 years ago on … Continue reading

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