Chemical traces of 2023 Canadian wildfires detected in Maryland months after smoke subsided

PHYSorg
Dec 9, 2025, 1:26 pm243 ptsTop
In 2023, Canada's worst wildfire season on record produced so much smoke that it spilled across national borders into the United States. At times, a thick haze enveloped much of the U.S. East Coast and triggered "Code Purple" and "Code Maroon" alerts—the most hazardous air quality warning categories—in the…

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