1.

Write the causes of depletion of ozone layer how can we prevent it ?

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Answer:

Explanation:EXCESSIVE USE of coal and petroleum products. Use of fuels instead of biogas. Increase in the number of refrigerators and air conditioners result in emission of chlorofluorocarbons which are harmful for environment and thus DEPLETE ozone layer. Excessive EMISSIONS of chemicals and toxic gases from chimneys of industries. These are some reasons behind depletion of ozone layer.

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