Air quality in Canada has improved over the past several decades, and Canada's air is among the cleanest in the world. But that progress is threatened by smoke from wildfires, which are becoming more frequent and more intense with climate change.
. This underscores the need to distinguish the health impacts of wildfire smoke from the impacts of other pollution sources.has been accumulating for years and the notion that wildfire smoke is"natural," and therefore less harmful than other types of air pollution, is not supported by the evidence.
Most studies have evaluated the relationships between daily changes in smoke levels and indicators of health such as emergency department visits, hospital admissions or deaths.
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