Dangerous radiation levels from fracking | Letter

Dr David Lowry on the risk of the radioactive gas radon being pumped into homes

I was very interested to read your report (13 October) on recent research by Harvard University scientists on radiation risks from fracking.

I have raised this concern in several letters to the Guardian over the past seven years. Indeed, seven years ago this month, Public Health England said in a review of potential risks that there is ... the potential for radon gas to be present in natural gas extracted from UK shale".