Ozone layer

Ozone in the stratosphere absorbs ultraviolet radiation.

Ozone in the troposphere is harmful to man.

Red has the greatest wavelength, which corresponds to lowest energy.

UV-C is the most harmful among UV-A, UV-B and UV-C.

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Ozone Layer

90% of the ozone layer is found in the stratosphere. Ozone actually protects us humans from the harmful UV radiation. However, in recent years, the ozone layer is depleting and the main cause is probably due to CFCs. Chlorine atoms destroy the ozone layer. If this prolongs, we will be more exposed to the harmful UV radiation which may cause skin cancer. In 1989, countries have step up and banned the production of CFCs to prevent the ozone layer from further depletion.

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