Dr Lee added: “In the UK, radon levels are highest in the Southwest and are often found in areas where there are tin mines.”
Apart from lung cancer, radon gas has been also linked to kidney cancer, melanoma, some types of blood cancer, and some brain tumours, according to research.
The expert said: “Even when radon doesn’t cause cancer, it can worsen other diseases.
“It has been linked to chronic obstructive pulmonary disease (COPD), and pulmonary fibrosis.”
What to do about radon
Dr Lee recommended to “check your radon levels” where you live. She instructed to explore the interactive map, by entering your postcode and seeing if you live in a high-risk radon area.