Concentrations of sulfur dioxide have sharply declined over the last four decades.
canadian air quality
Previous reports from other organizations including the David Suzuki Foundation used flawed methods to measure air quality.
Canada’s air quality conforms to the strictest standards in the world.
Canada has some of the most stringent air quality standards in the world.
Concentrations of ground-level ozone have also decreased.
Over the last four decades, Canada’s carbon monoxide levels have dropped by 90 per cent.