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What are the harmful effects of UV radiation?
First of all UV radiation is commonly divided into two components: UV-B (most of the sunlight is made up of this), which causes sunburn and makes the probability of a person getting skin cancer higher, and UV-A (smaller ratio in comparison to UV-B found in sunlight), which causes tanning and also may contribute to aging of the skin and skin cancer.
However UV-B radiation has more energy than UV-A radiation, meaning that UV-B radiation is much more dangerous for the health even though UV-A radiation might also cause some harmful effects to biological systems but surely not as much as UV-B does.
UV-B in small doses is vital for the human health because it acts like a catalyst in the generation of Vitamin D. Ultraviolet-B radiation exposure is most probably increasing due to the stratospheric ozone depletion. This is because the stratospheric ozone layer protects the biosphere (earth) from harmful UV-B radiation and if the atmosphere lacks in this layer then a significant increase in UV-B radiation could reach the earth’s atmosphere.
Approximate Word count = 851
Approximate Pages = 3.4
(250 words per page double spaced)
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