When we imagine air pollution, it’s always outdoors. We never consider the classroom our children sit in each day or their bedroom at home. The truth is, the air indoors is often more polluted than anywhere outside. Indoor air is contaminated with lead, formaldehyde, fire-retardants, radon, and chemicals from air fresheners, cleaners, and fragrances. Thankfully, there are active steps you can take to improve the quality of your indoor air. For instance, switching out your air filter monthly, cleaning regularly, and cutting down on air freshener use.