This was copied from the age http://blogs.smh.com.au/lifestyle/renovationnation/archives/2008/07/can_kitchen_cou.html?page=2#comments
There could be radioactive radon leaching out of your granite kitchen benchtops. There may be cancer-causing formaldehyde or benzene oozing out of MDF, particle board and laminate furniture. And let's not forget the paint on those walls - most hard-wearing acrylic paints off-gas VOCs (that's Volatile Organic Compounds) which can irritate asthma sufferers.
Another link from the same article
http://www.nytimes.com/2008/07/24/garden/24granite.html?_r=1&oref=slogin
While the articles are not saying we should panic and start ripping out the granite benchtop, I guess it's a good point to ask where your granite comes from and what are the radon levels, if known.