According to the EPA, Americans spend an average of 90% of their time indoors, where levels of pollutants are usually two to five times higher than outdoors.  Indoor pollutants contribute to asthma, allergies, and sick building syndrome, which is a blanket term for any indoor area that causes significant negative impact to human health.

Controlling the source of pollution is the most effective way to improve the air quality, though it is often the most difficult.  It is important to test your home for radon, asbestos and lead, which can be easily done with store-bought tests.  If abnormal levels are detected, contact a professional immediately to have them contained.  Other pollution sources, like nearby factories or freeways, can only be controlled through ventilation and filtration systems.  Make sure your filters are properly cleaned to maintain their effectiveness, and have a professional examine your system regularly to ensure its proper functioning.  If outdoor pollution is not a concern, keep windows open to circulate fresh air throughout the home.

A simple way to improve the air quality in your home is to purchase toxin-consuming plants, such as philodendron, peace lilies, mums, and bamboo palms.  These remove chemicals such as formaldehyde, carbon monoxide, and benzene from the air.  To prevent these toxic chemicals from entering your home in the first place, make conscientious purchases.  Paints, furniture, carpets, glues, and cleaning products all release noxious gases and volatile organic compounds that are extremely harmful to your health.  Look for low-VOC, formaldehyde-free, and natural versions of these products to keep the harsh chemicals out of your home.