The most common source of potential, significant exposure is radon gas.

All 10 of these homes had successful measures taken to prevent radon gases.

Fifty-seven homes were also test for radon gas at this time.

"They use bubblers inside the water that pick up the radon gas and take it out."

For example, lung cancer has several causes, including tobacco use and radon gas.

Elevated levels of radon gas have been found in homes in your state.

Outdoors, radon gas dissipates and is not much of a threat.

According to some studies, radon gas is the leading cause of lung cancer in non-smokers.

An 1980 study by the service found that such cancers were attributable to radiation from radon gas.

For the first time, the calculations include the effects of radon gas seeping into houses.