Laugh and Lols

Laugh and Lols
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UV (Ultraviolet Radiation) consists of the short, invisible rays from the sun that reach the earth's surface. These rays contain three separate bands: UVA (315-380 nm), UVB (290-315 nm) and UVC (100-290 nm). UVC rays are absorbed... See more »
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From the list : Things I Can't Live Without by markcijo

marks blog

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