It had better not use marble in the bedroom and old person, the patient, in child's living room the big area. It must pay attention grasps some choices the method and the standard, for instance, in the normal condition the stone material radioactivity may looking from the color, marble radioactivity from high to low in turn be red, the green, the meat is red, iron grey, white and black. Already repaired the room, may invite the expert to the scene examination, if the radioactive target is excessively high, must take the measure immediately, carries on the replacement. If exceeding the allowed figure is not high, but does not need to demolish, maintains the room ventilates or selects the effective air cleaner then.It selects material from the ore, therefore also has the radiation.Marble radiation's height is decided by the undressed ore stone material radioactive height, but present melts the brick radioactivity about Bolivia not to force the examination. If the radioactivity is small, Bolivia melts the brick to be possible to ignore to human body's injury, but does not remove some inferior Bolivia to melt the brick to the human body the harm.