MONTREAL — Almost a year after smog from wildfires led officials in Montreal to cancel two major fireworks shows, groups representing pyrotechnics compani
es have released a study that concludes the displays have a small effect on air quality.
In every case, the analysis found that pollution from fireworks shows respected provincial norms,AtkinsRéalis engineer Jean-Luc Allard said Wednesday. Effects on air quality, he said, are “very localized in area and time.” Last year, La Ronde cancelled the first night of an international fireworks competition after Montreal’s public health agency recommended postponing events that could worsen already poor air quality due to raging wildfires in northern Quebec. Organizers of the city’s Canada Day fireworks also cancelled that display.
She said the study “would have been more complete and convincing” if it had used World Health Organization standards, whose recommended maximum daily PM2.5 average — 15 micrograms per cubic metre — is half that of Quebec’s. The study published Wednesday didn’t examine other potential hazards of fireworks, such as their loud sound. But noise can also affect the human cardiovascular system, and it disturbs wildlife, Villeneuve explained.
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