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Ozone layer acts as a shield against the ultra violet rays and protects the life on the earth. Ultra violet rays are emitted by the sun. These rays are intercepted by the ozone layer of the atmosphere before they reach the surface of the earth. Ozone layer absorbs harmful emissions from the sun and protects the life on the earth. Ozone layer is composed of ozone, a molecule made up of three oxygen atoms which are bonded together.
Effects on the Ozone Layer. The ozone layer helps to protect life on earth from the sunâs ultraviolet rays, but human activities have contributed to the accelerated depletion of this protective shield.he ozone layer helps to protect life on earth from the sunâs ultraviolet rays, but human activities have contributed to the accelerated depletion of this protective shield.