Exposure to radon gas is the second leading cause of cancer, according to a new country-wide study led by a researcher at the University of Calgary.

The authors say the study, released Wednesday, is the first comprehensive update on radon exposure in Canada since 2012.

It says nearly 17.8 per cent of Canadians live in buildings that contain dangerous levels of the cancer-causing gas. That’s more than double the 7 per cent of households that were estimated to have radon levels in the last major study in 2012.

Platinum Air Care has been provides radon mitigation solutions across Southwestern Ontario.