There are several types of electromagnetic radiation such as, radio waves, infrared light, visible light, ultraviolet light, and X-rays.
Some radiation from elements can be deadly.
The bombs that the United States dropped on Hiroshima and Nagasaki, Japan, at the end of World War H, were hydrogen and plutonium bombs, respectively.
The radiation from other elements is harmless.
Seventy-eight percent of the air we breathe is nitrogen, whose radiation obviously is not dangerous.
Most types of radiation are harmless at low levels of exposure, but even infrared radiation can be harmful if it is of a high intensity.
