Wildfire smoke is a toxic cocktail of gases, small particles and other ingredients. It’s known to contain hundreds of chemicals. It contains particulate matter, sometimes referred to as soot. …According to an article published by Stanford University, repeated, acute exposure to smoke can shorten firefighters’ life expectancy by about a decade. …Guy Bourgouin, an NDP member of provincial Parliament in Ontario, has demanded breathing protection for wildland firefighters in the province’s legislature. He says the government has been receptive. …Provincial agencies share information and resources through the non-profit Canadian Interagency Forest Fire Centre. It sets standards, including a fitness test used to determine whether a candidate is strong enough to withstand the job’s rigours. But CIFFC has no discernible role in breathing protection and denied an interview request for this story. …The BC Wildfire Service has emerged as Canada’s leader in this quest. Working with the University of Alberta, in 2019 it began studying smoke’s contents and sought to determine whether they were getting into workers’ bodies, with or without N95 masks. [The Globe and Mail is a subscription publication]