A passive sub-slab depressurization system is designed to achieve lower sub-slab air pressure relative to indoor air pressure by use of a vent pipe routed through the conditioned space of a building and connecting the sub-slab area with outdoor air. Read More
Smoking is the leading cause of lung cancer. Radon is the second leading cause, but the number one cause of lung cancer among non-smokers. Secondhand smoke is the third leading cause.