>>>>>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
>>
>>Makes you wonder if all those Romans died of cancer. Afterall, monuments, columns, and baths were mostly made of granite, marble, and limestone. Just imagine all those hours in the baths soaking in wet granite!
>
>
>I thought lead poisoning from plumbing and their pots was the romans main problem.

But they didn't know about radon then, did they ? :o)