Using a ventilation system indoors is the best way to improve air quality. Though many factors, including mold, dust, radon, carbon dioxide, tobacco smoke and cooking fumes, can contribute to poor indoor air quality, most people don't focus on indoor air and don't know how to use their ventilation systems if they have one.
Car Buffs Should Be Able to Name These Classic Cars From the ’50s. Can You?
7 Minute Quiz 7 Min