New York issues air quality alert days before World Cup final - BBC

New York issues air quality alert days before World Cup final  BBCHundreds of Canada wildfires prompt US air quality alerts as smoke spreads south  BBCWildfire smoke will drive poor air quality through Saturday as new plumes arrive from Canada  CNNWildfires force thousands to evacuate as skies darken over US and Canadian cities  Sky NewsAir quality plummets in 20 US states as smoke from Canadian wildfires spreads  The Guardian