<P> Background radiation is the ionizing radiation present in the environment . Background radiation originates from a variety of sources , both natural and artificial . Sources include cosmic radiation , and environmental radioactivity from such as naturally occurring radioactive materials including radon and radium , and fallout from nuclear weapons testing and nuclear accidents . </P>
<P> Background radiation is the ionizing radiation present in the environment . Background radiation originates from a variety of sources , both natural and artificial . Sources include cosmic radiation , and environmental radioactivity from such as naturally occurring radioactive materials including radon and radium , and fallout from nuclear weapons testing and nuclear accidents . </P>
name one man made source of background radiation
name one man made source of background radiation
nuclear weapons testing
nuclear weapons testing