Our earth is facing many more crisis now a days due to ozone layer depletion, global warming, acid rain and many more. this happens due to environmental degradation and imbalance in the ecosystem. the imbalance in the ecosystem is cause by toxic gases such as methane, sulphur dioxide, nitrogen oxide and cfc which comes from industrial processes and automobiles used in day to day life. if we reduce this gases in a very large amount in the atmosphere, we can save our mother earth and live a better lifestyle.
hope this will help u..