Canada’s air quality has markedly improved since 2006, according to a report by the Department of Environment. The data contradicted claims by then-Environment Minister Catherine McKenna that worsening pollution was fatal. “A majority of Canadians have clean air,” said an Evaluation Of The Addressing Air Pollution Horizontal Initiative. The department said air quality varied from place to place but noted improvements overall. “Canada has a low level of ambient air pollution compared to some regions of the world, and air quality in the country has generally improved over time,” wrote the staff. “Concentrations of the four key air pollutants for which Canadian Ambient Air Quality Standards have been developed — nitrogen dioxide, sulphur dioxide, fine particulate matter and ozone — decreased between 2002 and 2016,” said the report. “However ambient levels varied by pollutant and by region.” Sulphur dioxide emissions were down 63 percent over the period. Carbon dioxide and nitrogen oxide were down 32 percent. Soot, dust and other “fine particulate matter” declined 35 percent. “Reductions have been achieved,” wrote the staff.