Naturally, there is a layer of gas in the atmosphere around the earth called the ozone layer. It absorbs harmful ultraviolet rays from the sun. But its layer is getting weaker due to environmental pollution.
Ozone layer reaches its dangerous zone which is an alarming situation. Greenhouse effects are also main causes to damage ozone layer
The ozone layer or ozone shield is a region of Earth's stratosphere that absorbs most of the Sun's ultraviolet radiation. It contains a high concentration of ozone (O3) in relation to other parts of the atmosphere, although still small in relation to other gases in the stratosphere.