Question

Ozone is a special form of oxygen found in the upper stratosphere and lower mesosphere. This ozone layer is very important as it acts as a filter and protects the Earth from harmful ultraviolet (UV) rays from the Sun. This layer, thus, acts as a shield over the earth’s surface. Without the Ozone layer in the atmosphere, life on Earth would be very difficult.

Global warming is a threat to life on the earth as it causes the snow in coldest parts of the world to melt. As a result of the sea level would rise, causing floods in the coastal areas. There may be drastic changes in the climate of a place leading to extinction of some plants and animals on Earth. Global warming can be prevented by minimising the use of CO₂, CFCs, methane, etc.