Very Interesting...
If you have granite counter tops in your kitchen, you might want to read this article in the NY Times. Not to be an alarmist, but Radon gas is serious. When we were buying our house in Columbus, we had it tested for Radon since it is a problem in Ohio. The EPA limit is 4 picocuries per liter of air (a measure of radioactive emission) and our house was reading twice that amount on some days, and even higher on others. So we put in a Radon gas mitigation system, and now hopefully we won't die of lung cancer. It's crazy that the previous owners lived here for 10 years and didn't even realize what they were exposing their family too. I just don't think there is enough information out there about this.
Oh, and we don't have granite counter tops. I know that they are beautiful, and everybody knows that I love rocks, but they are expensive, and not environmentally friendly. (The amount of energy expended in the mining and finishing process is ridiculous. This doesn't even factor in shipping the material from wherever it was mined.)
End of my rant. Just something interesting to be aware of, and to think about...