Which statement about radon exposure is true?

Which statement about radon exposure is true?

• A. It may cause liver cancer
• B. It cannot enter homes
• C. It is visible to the eye
• D. It may cause lung cancer

Answer: (D)

Radon exposure in homes is a health risk because radon is a radioactive gas that can seep into buildings from the surrounding soil. It cannot be seen, smelled, or tasted, so you can’t know it’s present without testing. It may cause lung cancer. When radon decays, it releases particles that, when inhaled, can damage lung tissue and raise the risk of lung cancer. The risk increases with higher radon levels and longer exposure, and it's especially higher for smokers. It is not linked to liver cancer. Radon can enter homes through foundation cracks, gaps around pipes, and other openings, which is why testing and, if needed, mitigation are important. Mitigation options include sealing entry points and installing a radon reduction system if test results exceed recommended levels.

Radon exposure in homes is a health risk because radon is a radioactive gas that can seep into buildings from the surrounding soil. It cannot be seen, smelled, or tasted, so you can’t know it’s present without testing. It may cause lung cancer. When radon decays, it releases particles that, when inhaled, can damage lung tissue and raise the risk of lung cancer. The risk increases with higher radon levels and longer exposure, and it's especially higher for smokers. It is not linked to liver cancer. Radon can enter homes through foundation cracks, gaps around pipes, and other openings, which is why testing and, if needed, mitigation are important. Mitigation options include sealing entry points and installing a radon reduction system if test results exceed recommended levels.