Revision 4115657 of "Radiation pollution" on simplewiki

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Radioactive substances emit energy in the form of radiations.There is a background of natural radiation everywhere in our environment. It comes from space i.e.,cosmic rays and from naturally occurring radioactive materials contained in the earth and in living things.In the natural environment,radiations are always being emitted from terrestrial sources and from the cosmic rays from space.But these emissions are of very low level.Since the beginning of life,every living being is exposed to the natural radiations.'''

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