What is cancer-causing radon gas and is my area at risk?

According to the EPA, testing is cheap, and the fixes for radon exposure are straightforward.

The Environmental Protection Agency has estimated that as many as 170,000 homes, particularly in Munster and Connacht, are at risk from radon.

Radon is a radioactive gas which has been linked with an increase in lung cancer and has been described as “serious public health hazard” by EPA director Micheál Lehane.