Wildfire Smoke Chokes Global Air Quality Efforts

Wildfires and heatwaves, driven by climate change, are significantly undermining global efforts to improve air quality and protect health, according to the World Meteorological Organization (WMO). These extreme events release microscopic airborne pollutants, including toxic PM2.5 particles, which pose serious health risks.

While some regions have reduced industrial PM2.5 emissions, exposure to fire-related pollutants has increased. The WMO highlights that these wildfire-generated particles are more toxic than those from sources like vehicle exhaust and can be carried vast distances, affecting air quality assessments. Conventional models may underestimate mortality risks from wildfire smoke by up to 93%.

Ground-level ozone, exacerbated by heatwaves, and aerosol particles like black carbon are also growing concerns. Black carbon deposition on snow hastens melting, while microplastics, formed from degrading plastics, are found globally in air, soil, and oceans, with plastic waste being a significant source. The WMO stresses the need for coordinated policies for air quality and climate, as they cannot be addressed in isolation.