Category: Dense

Dense smoke from Canadian wildfires is blowing into U.S.  The Washington PostCanada Wildfires Create Unhealthy Air For Millions In Midwest  The Weather ChannelBillowing smoke from Canadian wildfires wafts into the U.S.  NPRRecent Canadian wildfires are record-breaking – and will threaten US air quality for days  The GuardianMore hot weather forecast as Canada battles fires and smoke billows south  BBC…