The air inside your home is an extension of your lungs. You eat approximately two to three pounds of food per day, drink about three pounds of liquid, and breathe 15 pounds of air. You can live 40 days without food, three days without water, but only three minutes without air. Whatever you eat goes through a digestive system enabling your body to separate nutrients and waste material.
Lungs have no such defensive system.
What you breathe goes directly into the bloodstream. It is then carried via the blood to every cell in the body. In 1989, the EPA submitted a report on indoor air quality to the United States Congress. The report concluded that North America's worst air pollution is found inside our homes. A five-year study, done by the EPA, showed that many homes had chemical levels that were 70 times higher than that of the air outside.