A matter of grave cncern- Is GRANITE Radioactive??

Granite is an intrusive igneous rock which is found below the surface of the Earth. It is commonly used to tile platforms in kitchens, floors and many other uses which bring it close to the human body. According to a recent study, Granite has been found to be radioactive.
Let me Explain before you gasp and remove all the granite from your house and office. Every element gives out some amount of radioactivity, which is sometimes not measurable! But granite gives out a large amount of Radon! It also contains uranium! I was shocked wen someone told me this, but on further reading, I found out that what he said was very much true! It was already known that almost every substance had Carbon 14, but it did not give out that uch Nitrogen or radon. And this was what instigated the scientists to carry out this study.
Granite can emit more than 10 times the radon than other common household materials. It releases Radon when the Uranium present in the granite slabs break up. Radon causes lung cancer if one is exposed to it for long.
So do you thik that we have gone too much into Mother Earth's skin, The crust? (granite is found underneath the crust when newly formed). Is this her punishment for disturbing the natural balance?

Granite