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    • Woman's 2-day old badly sunburnt back.
    Rights: Public domain Published 29 July 2008, Updated 4 November 2019 Size: 360 KB Referencing Hub media

    A sunburn, photographed two days after a five-hour exposure to the sun. The non-burned areas were covered by togs.

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      ARTICLE

      Positive and negative effects of UV

      The Earth’s atmosphere blocks most of the Sun’s UV radiation from penetrating through the atmosphere. The small amount that gets through has both positive and negative effects. Positive ...

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