Date Published: 04/09/2020 [Source]
An EPA study found that many Americans spend an average of approximately 90 percent of their time indoors. This finding underscores the importance of maintaining a healthy breathing environment at home because the concentrations of some pollutants are two to five times higher indoors than they are outdoors.
Substances of natural origin such as radon, pet dander and mold are natural substances that can pollute indoor areas.
Test for radon: A naturally occurring radioactive gas, radon has been shown to cause lung cancer. Radon is present in almost all rock, soil and water, and it can enter the home through cracks and other holes in the foundation. Radon testing kits can be obtained online and in home improvement stores, but discounted test kits can also be found by contacting National Radon Program Services or your state's radon program. Some states even offer free testing kits to the public.