That's because when you breathe air containing radon, you can get lung cancer.

It is well known for its hot, radio-active water containing radon.

The water, oil and gas from a well often contains radon.

The church was built over a spring whose water contains radon which is said to alleviate eye diseases.

When people breathe air containing radon, it increases their risk of developing lung cancer.

When you breathe air containing radon, you increase your risk of getting lung cancer.

You can also be exposed to radon by drinking water obtained from wells that contain radon.

The church is built adjacent to a spring whose water contains radon, which is supposedly beneficial to eyesight.

The air containing radon never enters the home or building.

Drinking water containing radon also presents a risk of developing internal organ cancers, primarily stomach cancer.