A special study is underway across the Channel Islands to investigate the levels of radon – a naturally occurring gas.
Home testing kits have been issued to some households across the Channel Islands.
Exposure to the substance, which can be found in areas that contain granite, has been linked to an increased risk of lung cancer, especially among smokers.
Homes in Jersey, Guernsey, Alderney and Herm have been selected at random to participate in the study.
