On the Level:Radon in granite countertops is nothing to worry about

We saw a news story recently about granite countertops giving off Radon gas. We have a granite kitchen countertop. I'm wondering what we should do. What do you think?

I, too, have heard that claim and the first time I heard it was over 10 years ago.

Radon is a naturally occurring gas generated by the decay of trace amounts of uranium found in the earth's crust. So it's here to a greater or lesser degree depending upon the soil makeup under our houses. It is an unstable gas that quickly breaks down and dissipates in the air. Elevated exposures to radon have been linked to lung cancer.

Radon is measured in...