Phoenix residents are breathing bad air nearly half the year azcentral.com - get the latest breaking news, showbiz & celebrity photos, sport news & rumours, viral videos and top stories from azcentral.com Daily Mail and Mail on Sunday newspapers.
In 2020, the Las Vegas metropolitan area saw 81 days with elevated ozone and 32 days with elevated PM2.5 pollution fine particulate pollution that comes primarily from burning fossil fuels and, especially in recent years, wildfires affecting more than 2 million residents in the valley.