radon gas risk 2

https://getradonfaninstallationinsight.nexorafield.com/posts/expert-tips-for-radon-fan-installation-in-jefferson-county-homes

You can't see or smell radon gas, but it's the second leading cause of lung cancer and a serious concern in many homes. This radioactive gas seeps up from the soil and can build up to dangerous levels in basements and lower floors. Testing is the only way to know if your house has a problem, and it's a simple, affordable step that could protect your family's health for decades.