Thick smoke fills the air and nearly blocks out the sun, east of Kamloops, B.C., on Aug. 14, 2021. THE CANADIAN PRESS/Darryl Dyck

Wildfire smoke may warm the Earth for longer than we thought

Brown carbon refers to a range of pollutants found in smoke from wildfires. They can contribute to global warming before they undergo a process that alters their chemical properties.

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