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Smoke from wildfires in Canada has spread more than 5,000 miles, reaching parts of Russia and Europe during the past week.
The country's legacy of mining means that toxic metals could be carried along plumes of smoke, endangering people in its path.
Canadian wildfires are impacting air quality ... Buckingham noted that "there will be episodes where the smoke can reach the lower levels of the atmosphere and affect visibility and air quality.
Wildfires are currently burning in Manitoba, Ontario, and Saskatchewan, Canada. The smoke may ... "There will be episodes where the smoke can reach the lower levels of the atmosphere and ...
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