ionizing radiation is harmful to human skin
x_rays is not ionizing_radiation. alpha_radiation is not ionizing_radiation. ionizing_radiation is not electromagnetic_radiation. alpha_radiation is ionizing_radiation. ionizing_radiation is not radiation. cosmic_rays is ionizing_radiation. x_rays is ionizing_radiation. ionizing_radiation is electromagnetic_radiation. cosmic_rays is not ionizing_radiation. ionizing_radiation is radiation.