Canada, US Air Pollution Hits Highest Levels Since 1998 Due to Wildfires

Canada experienced its worst air pollution levels since 1998 in 2023, primarily driven by a record-breaking wildfire season that burned over 15 million hectares of forest, significantly increasing fine particulate matter (PM2.5) in the air. This surge in pollution also affected parts of the United States, where fine particulate pollution reached its highest levels since 2011, particularly in eastern and midwestern states. The increase in PM2.5, known for its serious health risks due to its ability to penetrate deep into the lungs, reversed years of progress in air quality improvements in both countries. Globally, air pollution levels remained relatively steady, but South Asia continues to face the highest pollution, with India’s PM2.5 levels vastly exceeding World Health Organization recommendations. Additionally, urban areas worldwide contribute heavily to air pollution through industrial activity, vehicular emissions, and energy consumption, leading to rising greenhouse gas emissions and increased respiratory health problems. The ongoing challenges highlight the urgent need for effective policies and interventions to mitigate pollution and protect public health.