sunbed tanning bed exposure?

User Generated

elqre_OVATB

Health Medical

Description

The reason skin does not produce melanin outdoors at dusk and dawn is that UV in sunlight at that time of day:

 Has no UV light at all.
 Is almost all UVA
 Is almost all UVB
 Is almost all UVC

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Explanation & Answer

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Is almost all UVA

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Anonymous
Very useful material for studying!

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