On 27/04/2019 10:14, The Natural Philosopher wrote:
IIRC if you are aÂ* smoker there is anout a 10% -15% increased risk of
lung cancer.

If you dont smoke there is no increased risk.

Did you follow all the links?

We've got one saying the increased risk is only to smokers. Another
suggesting that in the USA there are a couple of thousand radon linked
excess deaths each year - and they seem to have controlled for smoking.

Andy