A new study showed that, in the minutes immediately following fireworks displays, pollutants tend to drift into nearby neighbourhoods where they reach harmful levels, but those effects are localized and short-lived.
Multiple fireworks shows were cancelled in Quebec last summer due to smoke from wildfires, but now the fireworks business says the impacts are not so bad.
Environment Minister Steven Guilbeault accused Pierre Poilievre of searching for conspiracy theories after the Conservative leader mocked efforts to gauge wood-smoke pollution.
A social media skirmish has erupted between Canada’s environment minister and the leader of the official opposition over attempts by the federal government .