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What is radiation and how it can be both beneficial and harmful?

What is radiation and how it can be both beneficial and harmful?

"We get radiation from the sun, from the earth, from the rocks, the soil, and the air and we have a lot of radioactivity in our own bodies" says Michael O'Riordan from The National Radiological Protection Board in Britain.

Picture: Radiation sign, Credit: Thinkstock

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Βι¶ΉΤΌΕΔ World Service Archive

This programme was restored as part of the World Service archive project