Air fresheners can release phthalates into the air.
If wind blows pollen into your home, it can remain there day and night.
Paraffin may contain contaminants, which are released into the air as candles burn.
Dander from cats, dogs and other pets contain allergens that linger on walls and surfaces.
Every time you fry or grill food, particulate matter, carbon monoxide and volatile organic compounds (VOCs) are dispersed into the air.
Household products like sofas, chairs and rugs often contain flame retardants, a noted VOC.
Air by the Numbers
90 percent of the air that goes into your lungs is indoor air.
U.S. EPA studies found that indoor air pollutants were generally two to five times greater than outdoor pollution levels. In some cases, indoor air pollution was 100 times greater.
Nearly 25 million people in the U.S. suffer from asthma.
Asthma is the cause of approximately two million emergency room visits per year in the U.S.
Up to 30 percent of adults have allergies.
Up to 40 percent of children have allergies.
Up to 30 percent of people with allergies have reactions to cat and dog hair and dander.
Up to 90 percent of households have detectable levels of dog or cat allergens.
About 40,000 droplets of the flu virus are in a typical sneeze. The smaller droplets can shoot out at 100 miles per hour and may remain suspended in the air for hours or days.