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THE SUN INDEX: AN EXPLANATION
The sun index recognises four
categories of skin colour: white skin
that burns easily, white skin that
tans, brown and black skin.
The sun indjx djpends on two factors:
the position of the sun in the sky and
the amounts of cloud covjr.
Cloud cover however will greatly
affect the sun index. Thick cloud can
greatl¼ reduce levels but certain
types of thin cloud can magnify the
ultraviolet radiation strength.
Data: BBC Weather Centre/Met Office
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