Canada's Air Ranks as Worst in World Due to Wildfire Smoke Canada's air quality crisis has reached catastrophic levels, with the country now holding the dubious distinction of having the worst air quality in the world.
According to data from the World Air Quality Index, Canada's pollution levels are roughly twice those of India and China, two countries notorious for their own poor air quality.
Wildfires, a natural phenomenon that can release massive amounts of pollutants into the atmosphere, are a significant contributor to this crisis.