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Radiation occurs from three natural sources: radioactive material in the environment, such as in soi...

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exposure to even tiny amounts of radiation is fatal  the effect of exposure to radiation is slow in coming  radiation is avoidable in space exploration  astronauts in spacesuits needn’t worry about radiation damage  
exposure to even tiny amounts of radiation is fatal  the effect of exposure to radiation is slow in coming  radiation is avoidable in space exploration  astronauts in spacesuits needn't worry about radiation damage  
the Apollo mission was very successful  protection from space radiation is no easy job  astronauts will have deformed children of grandchildren  radiation is not a threat to well protection space explorers  
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Radiation fog  Frontal fog  Convection fog  Advection fog"  
The Atmosphere and Our Environment  Research on Radiation  Effects of Space Radiation  Importance of Protection Against Radiation  
astronauts will have deformed children of grandchildren  radiation is not a threat to well protection space explorers  the Apollo mission was very successful  protection from space radiation is no easy job  
the effect of exposure to radiation is slow in coming  exposure to even tiny amounts of radiation is fatal  radiation is avoidable in space exploration  astronauts in spacesuits needn’t worry about radiation damage  

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