Health committee  There are actual professional radon mitigators. Health Canada provides a directory of all the licensed mitigators across the country. For our work and what we do, if people come back with a test result of over 200 becquerels per cubic metre, we direct them to Health Canada to follow the process for how you find the right mitigator and who in your region can do it.

Health committee  There's a Take Action on Radon network that has a lot of support from Health Canada, the Canadian Lung Association, and the Canadian Cancer Society. There's also a group, the Summerhill group, but I can't remember what they do. Again, they're a community awareness and environmental initiatives group.

Health committee  Yes, I can take that one. In our Canadian geology, basically we sit on a whole bunch of rich natural resources, one of them being uranium. Uranium contributes most of the emissions of radon gas. We have geology maps that target where we have areas of high uranium and areas where we don't.

Health committee  I think the other consideration is that when you're looking at what the right age is, the evidence from the NLST study is that with regard to the 55-to-74 age group and the 30 pack-year criteria, this is where the benefit occurs. So if you were to start, you would start there. The other issue with over-screening, and we see this for other types of screening, is that we know there are populations where screening doesn't work.

Health committee  Thanks. I'm Robert Nuttall. I'm the assistant director of cancer control policy. I'll be doing the presentation, but my colleague, Rob Cunningham, a senior policy analyst with the society, will also be here for the question period. Chair and committee members, I want to thank you for the opportunity to talk to you today about lung cancer.