1.
This type of effect is called ozone layer depletion.
2.
The main cause of it is the production of green house gases like CO2 , SO2 , CO, CFCs uncontrollably on the surface of earth.
3.
To control such effect we should do the following steps:
- We must reduce the use of fossil fuels in industries and vehicles.
- Machine which operates with CFCs should be banned
- Reforestation should be done world widely.