cost of radon mitigation
http://knoxcjra907.unblog.fr/2019/11/23/radon-connected-with-cancer-how-to-ensure-your-home-is-radon-free/
Radon is an indirect decay product of radium which is present in uranium ore. It is an odorless, radioactive and colorless gas that has actually been found to be present in the majority of United States houses.