No, it is not true. We are not aware of any equipment affected by what would likely be VOCs. Carpet adhesive can have some known toxic chemicals that off gas into the home, but it does not produce radon or radon progeny. Radon gas is a byproduct of uranium in the soil. Granite slabs have been known to carry varying concentrations of uranium that may contribute to indoor radon levels, but again, this is an isolated minor contributor. If building materials or glue contain uranium, then someone is in big trouble! You may hear other variations or theories based upon what people were told or what people have read on their own. My suggestion would be to always contact a qualified professional or reference the EPA, cancer.org, lung.org or AARST/NRPP websites for accurate information.