In many cases, mitigators can make use of PVC piping and also specialized radon suction fans to tire sub-slab, or sub-membrane radon and also various other soil gases to the outside environment. The majority of these options for radon reduction call for upkeep, as well as it is necessary to continually change any followers or filters as needed to continue proper functioning. The U.S. Environmental Protection Agency (EPA) has determined radon as the second leading root cause of lung cancer in the United States. Several homes contain radon concentrations that are high sufficient to give their passengers life time exposures that might raise their danger of developing lung cancer cells.