Final answer:
Radon poses the greatest potential health risk to people when it is trapped and concentrated in inadequately ventilated areas. Proper ventilation and regular testing are important to mitigate the risk.
Step-by-step explanation:
Radon poses the greatest potential health risk to people when it is trapped and concentrated in inadequately ventilated areas.
Radon is a radioactive gas that is produced from the decay of uranium in soil and rocks. It slowly escapes from the ground and can seep into homes and other structures, especially in basements and lower floors. When radon is not properly ventilated, it can accumulate and pose a higher risk to people's health, increasing the likelihood of developing lung cancer.
To mitigate the risk, it is important to have proper ventilation in areas where radon is likely to be present, such as basements, and to test for radon levels regularly.