In stratosphere, which of the following elements acts as a catalyst in degradation of ozone and release of molecular oxygen?
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CFCs and other halogenated ozone depleting substances are mainly responsible for man-made chemical ozone depletion. CFCs rise into the stratosphere where they are eventually broken down by UV rays from the Sun. This causes them to release free chlorine, The chlorine reacts with oxygen which leads to the chemical process of destroying ozone molecules,
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