Radon exposure is most commonly a concern in which type of environment?

Radon exposure is most commonly a concern in indoor spaces because radon is a colorless, odorless gas that originates from the natural decay of uranium in soil and rock. It can easily infiltrate buildings through cracks in floors and walls, construction joints, and gaps around service pipes. While radon is present in the outdoor environment, it tends to dissipate in the open air, diluting its concentration to a much lower level compared to enclosed spaces.

In indoor environments, especially in basements, homes with poor ventilation, or buildings constructed on uranium-rich soils, the levels of radon can accumulate to hazardous concentrations. This makes regular radon testing and mitigation in indoor spaces essential to reduce the risk of health issues, notably lung cancer, associated with prolonged exposure to high levels of radon. Thus, the emphasis on indoor spaces aligns perfectly with the understanding of where radon poses the greatest risk.