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"Risky Rainbow"
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- Words:
- 515
- Submitted:
- Tue Jul 07 2009
- Mark submitted by Author:
... "Risky Rainbow" Ultraviolet Ultraviolet (UV) radiation is the least damaging type of dangerous radiation. The sun is the main natural source of UV. 99% of UV radiation emitted by the sun is absorbed in the Earths ozone layer. It is also invisible to the human eye. UV radiation comes with risks. As it is an ionizing type of radiation it can cause cell damage. As sun rays emit UV, it most commonly causes skin damage. This is when the UV rays damage skin cells, and sometimes even killing them. The damage caused by UV radiation usually only occurs on the surface of the body as it is not very penetrating. Most commonly, UV causes sunburn, and in more extreme cases, skin cancer. Eyes and the immune system can also be damaged by UV radiation. A positive effect of UV is that it brings about the production of vitamin D in the skin.
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