Radon is a colorless, odorless, naturally occurring radioactive noble gas. It is a decay product primarily resulting from the breakdown of radium within the Earth's crust. Because of its gaseous nature, it can accumulate in enclosed spaces, such as basements and indoor environments, diffusing from soil and underlying rock formations. The associated hazard lies in the inhalation of the gas, as its radioactive decay products are internalized by the respiratory system. Exposure to radon gas over extended periods is an established environmental health concern due to its increased risk of causing respiratory illnesses. Measurements and mitigation strategies involve testing air quality and implementing methods to reduce gas ingress into occupied structures.