Politics Wildfires are bad for air quality. Fireworks can make the smoke worse. Swirling soot from Canadian blazes is likely to compound the usual pyrotechnics pollution on July 4. Health experts urge caution.
Impacts Fireworks and wildfires don't mix July 4 is the worst day for human-caused fires in the U.S. As climate change worsens, scientists are urging people in the West to skip the pyrotechnics.
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