Also consider installing a house energy recovery ventilator system. They provide moisture control, indoor air quality and energy recovery. The major sources of radon come from the soil surrounding the house. The gas can enter through cracks in the foundation floor and walls, drains, sumps, joints or other openings. It can even be transported through water.
Exposure can lead to lung cancer, especially for smokers.
Check the July 1995 Consumer Reports for recommendations. If high levels are found, hire a professional to fix the problem. However, researchers discovered that the fibers are small enough to be inhaled into the lungs and can scar lung tissue, cause lung cancer and mesothelioma, a fairly uncommon cancer of the lining of the lung or abdominal cavity. Schools have been spending large amounts of money to remove asbestos from classrooms. The risks of being exposed are slim as long as the materials using it are not deteriorating.