Fact File: Chemical smell from wildfire smoke is not evidence of spraying

Theory Briefing

• Smoky skies from wildfires triggered social media posts insisting the chemical smell is proof of deliberate aerial spraying, not natural combustion.
• Wildfire smoke contains hundreds of chemical compounds from burning vegetation, which can produce sharp, unfamiliar odors that feel man-made to many people.
• When an unusual sensory experience lacks an obvious explanation, people are more likely to reach for intentional or conspiratorial causes over natural ones.
• Fact-checkers note the smell is consistent with known wildfire chemistry, directly contradicting the spraying narrative circulating online.