New perk: Easily find new routes and hidden gems, upcoming running events, and more near you. Your weekly Local Running Newsletter has everything you need to lace up! Subscribe today. New York, and ...

What is particulate matter? How do I interpret the AQI? There's a lot to learn since Canadian wildfires suddenly sent clouds of hazy smoke over the border and into parts of the Midwest, Northeast and ...

Salt Lake Valley’s west-siders expect bad air. Winter inversions hit them harder than the east, with historic redlining exacerbating the issue. But how much do hazy conditions outside affect the air ...

While Chicagoans may have heard the city's air quality is particularly bad right now, just how bad is it and what exactly is causing the "unusual" levels? The conditions have already led to an air ...