Here’s why the wildfires burning in Canada aren’t being put out
CNN reports: Another wave of wildfire smoke has drifted into the US, dimming blue summer skies and igniting troubling concerns regarding the increasing frequency of fires, and what they have to do with climate change. More than 100 million people are under air quality alerts from Wisconsin to Vermont and down to North Carolina as smoke from Canadian wildfires continues to waft south, though conditions are expected to improve slowly into the holiday weekend. Air quality on both sides of the border has…