An air quality map shows conditions improving in the U.S. on Friday as smoke from the Canadian wildfires subsides.

With 174 active wildfires burning across Canada, several U.S. states are under air quality alerts due to the traveling smoke from these flames.

Since the weekend, several major fires have been raging across Canada’s central and ... when it comes to air quality in the United States. AirNow’s map shows that on Wednesday, air quality ...