Raging wildfires in Northern California have affected air quality across the United States. Smoke drifting from the Caldor Fire has covered areas in and around Lake Tahoe in recent days, with air quality listed as hazardous for much of the region. Watch more about how wildfires can diminish air quality: https://www.youtube.com/watch?v=GMxAqhHbPCs&t=26s. Read more: https://wapo.st/3BcLzib. Subscribe to The Washington Post on YouTube: https://wapo.st/2QOdcqK Follow us: Twitter: https://twitter.com/washingtonpost Instagram: https://www.instagram.com/washingtonpost/ Facebook: https://www.facebook.com/washingtonpost/