Unhealthy air quality is bringing new health hazards to the nation’s workforce. More than 83 million Americans, about one in four people, are exposed to unhealthy outdoor and indoor air quality every year, and that number is only expected to rise due to more frequent and severe climate events, such as wildfires, heatwaves, and droughts. Here’s what to know about the risks to your workforce and business health — and what you can do to protect your employees.