DRUM - - In The Classroom -

Although most of these rays are ab­sorbed by the ozone layer, enough of them reach us to cause se­ri­ous skin dam­age in­clud­ing sun­burn and cataracts (cloud­ing of the eye lens).

UVB rays can also af­fect our im­mune sys­tem and con­trib­ute to skin can­cer. Melanoma, the most dan­ger­ous form of skin can­cer, is thought to be as­so­ci­ated with se­vere UVB sun­burn that oc­curred be­fore the age of 20.

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