radon health risk

https://radonfoundationaccessguide.clearhavendigest.com/posts/how-radon-foundation-access-shapes-effective-mitigation-in-st.-louis

Radon health risk is serious because this invisible, odorless gas can seep into homes from the ground and, when breathed in over years, damage lung tissue and increase the chance of lung cancer. Testing your home is simple and the only way to know your exposure level.