>>>http://www.nytimes.com/2008/07/24/garden/24granite.html?no_interstitial
>>
>>FWIW, there are actually no studies that show that radon at the levels found in many homes (and for which the guideline is to remediate) causes cancer. The only studies that show cancer involve uranium miners exposed to extremely high levels.
>
>The EPA disagrees: http://www.epa.gov/radon/pubs/citguide.html
>
>Also there is the Wikipedia overview: http://en.wikipedia.org/wiki/Radon#Precautions

Yeah, I know. But when you actually start digging (as my husband needed to, for business reasons), it turns out there's no good research on this. He actually had this discussion with someone at the state DEP and the guy send him a whole pile of material, but admitted that none of it was actual studies of whether small concentrations of radon, such as those found in homes, cause lung cancer.

The statistics that are used everywhere are extrapolated from the studies of uranium miners.

Tamar