Indoor Air Quality Resources E.P.A Indoor Air Quality Page American Lung Association Humidifiers-Dirty Humidifiers May Cause Health Problem Check Your Cities Pollen Count E.P.A Biological Contaminant Site Learn About Airborne Allergens(NIAID)(pdf) Killer Lurking In Your Home Carbon monoxide Carpet and Indoor Air Quality(pdf) Environmental Tobacco Smoke(pdf) House Dust Allergy (ACAAI) Articles Indoor Air Pollution Increases Asthma Symptoms, Study Suggests Thunderstorms And Asthma Pollution Takes Its Toll on the Heart Air Pollution Damages More Than Lungs: Heart And Blood Vessels Suffer Too Monitor the Air - With a Smartphone House-sharing with microbes. Heating, Air-Conditioning and Carpets May Be Hazardous to Your Health