From flames to haze, wildfire smoke transforms as it travels, and it can harm your health in different ways

An atmospheric chemist explains that wildfire smoke chemically transforms as it travels, with sunlight breaking down the phenolic compounds responsible for campfire smell within hours and bleaching dark, light-absorbing particles into the pale haze seen drifting over eastern skies in summer 2026. Nitrogen oxides from hot, intense fires and ammonia from smoldering ones each produce distinct toxic mixtures that continue reacting to form ground-level ozone as the plume moves.

The piece notes that smoke lofted high into the atmosphere can travel thousands of miles and temporarily stop chemically aging until it sinks back toward the surface, where it may mix with urban pollution and generate additional ozone over cities far from the original fire.

The full dispatch is available from the source below.