Exposure to ionised radiation, whether cosmic or terrestrial, is a natural phenomena. So much so that even in nature, in a wide open, clean space, instruments can always pick up just a tiny bit of background radiation. Higher levels, however, can be hazardous to human health. Radiation is also released by construction material and products inside the home. This phenomenon is often ignored, mostly because of the lack of specific laws that set precise limits.
Listone Giordano has adopted a self-disciplinary system that involves strict controls and extremely narrow limits in terms of radioactive emissions both from raw materials and the end product.