radon health risk 2

https://theradonbasementblog.lumenforgex.com/posts/understanding-and-managing-radon-in-basement-spaces

Radon is a naturally occurring radioactive gas that seeps into homes from the ground, and it's the second leading cause of lung cancer after smoking. You can't see or smell it, so testing your home is the only way to know if you're at risk. Long-term exposure to elevated levels can seriously damage your lung tissue, making mitigation important, especially in basements and lower floors.