Ozone layer depletion: What factors in Nepal contribute to this? What you should do to minimise this?

Have you ever wondered about the fascinating reason why there is known life on earth only? Yes, it is because of oxygen, but not just the oxygen that you breathe, but also because of the oxygen that protects you from the sun. This oxygen settles and surrounds the earth in a thin layer and helps reduce harmful ultraviolet (UV-B) rays from reaching the earth’s surface making life possible on earth.

However, due to various reasons, including the urban lifestyle like that of Kathmandu, the ozone layer is depleting day by day. What is ozone layer depletion? What activities in Nepal are causing it? How can you contribute to preserving it?