https://www.canada.ca/en/services/health/healthy-living/environment/air-quality/wildfire-smoke.html
Wildfire smoke, air quality and your health: Overview - Canada.ca
As wildfires burn through forests and grasslands, they produce smoke. Smoke from wildfires in forests and grasslands can be a major source of air pollution for...
air quality and your healthwildfire smokeoverviewcanada