Mention any three human activities which are responsible for depletion of the ozone layer.

● Use of refrigerators by humans is one such activity. Refrigerators use chlorofluorocarbons (CFCs). These CFCs have chlorine molecule that have the capability to destroy ozone molecules.

● Emission of halogen source gas like bromine from human activities cause depletion of ozone in stratosphere.

● Air conditioners too use chlorofluorocarbons. CFCs are ozone depleting substances. When they are emitted from air conditioners they adeplete ozone layer.