Smoke from nearly 900 Canadian wildfires is triggering air quality alerts across much of the U.S., with unhealthy air affecting millions from Minnesota to New H

Smoke from nearly 900 Canadian wildfires is triggering air quality alerts across much of the U.S., with unhealthy air affecting millions from Minnesota to New Hampshire. [▻](https://video.twimg.com/amplify_video/2077894246485336064/vid/avc1/1280x720/miGBFmFbNMgGSnhj.mp4)