As summer begins, it's important for us all to prepare for wildfire smoke. Wildfires produce thick smoke that can be a big source of poisonous air pollutants. This pollution contains gases and fine specks (not visible to the human eye) that enter our lungs and bloodstream, sometimes leading to serious health issues. Smoke can carry hundreds or thousands of kilometres from the fire zone. There is no safe level of exposure for most of these pollutants. This means that smoke can damage...