Q: Smoking increases the risk of cancer from what radioactive gas that can also be detected with a test kit for your home?


Read this paragraph and choose the correct option from the provided answers:

Radon is also radioactive and can easily be inhaled into the lungs. Over time, this internal radon exposure can lead to the development of lung cancer. The incidence of lung cancer in smokers exposed to radon is much higher than that in non-smokers exposed to radon since smoking has already produced some lung damage, and the radon simply makes the damage worse. Radon exposure is highest in homes lacking good air circulation to move the gas out of the residence. There are a number of inexpensive approaches to decreasing your exposure to radon. A good start is to test your living area for radon with a radon test kit.

 Choices:

- arsenic

- carbon monoxide

- carbon dioxide

- radon


A:
radon