This enhances its potentially damaging result in people. For example, radon-222, one of the most usual isotope of radon, is an item of the alpha degeneration of radium-226 atoms, found in rocks.

Does opening windows reduce radon?
Opening windows improves air circulation and ventilation, radon exposure symptoms helping move radon out of the house and mixing radon-free outside air with indoor air. Opening basement windows helps reduce negative air pressure, diluting radon with clean outdoor air.