As I am almost walking out the door to go and buy granite, suddenly I am reading about some varieties of granite being significantly radioactive and emitting radon. Some reports say granite is no more hot than beach sand, while others think it can cause lung cancer in those who hang around the kitchen. Has anyone here looked into this? I don't want to be a crank but on the other hand I don't want to tempt fate. I wonder how it compares with marble, radioactivity[-wise.