radon in basement 13

https://getradonbasementplus.currentvale.com/posts/understanding-radon-in-basement-risks-and-solutions-for-metro-east-illinois-homes

Radon in the basement is a silent health risk that often goes unnoticed. This odorless, colorless gas seeps up from the ground and can accumulate in lower levels of homes. Testing is the only way to know if levels are high, and mitigation systems can help reduce exposure. It's one of those home maintenance tasks that's easy to ignore but really important for long-term health.