A first-of-its kind study conducted in Canada鈥檚 two largest cities by 9I制作厂免费-led researchers has linked about 1,100 premature deaths per year to an unregulated air pollutant.
Ultrafine particles (UFPs) primarily come from vehicle emissions and industrial activities. Canada鈥檚 federal and provincial governments have not set concentration limits for UFPs, as they have for larger fine particles known as PM2.5.