Hello Aspirant

You can frame your answer like this:

It is very important to be aware about your environment and make efforts to preserve it.

Even in world history there have been cases where people made efforts to conserve environment.

The conservation ethic that began to evolve included three core principles: that the human activity damaged the environment, that there was a civic duty to maintain the environment for future generations, and that scientific, empirically based methods should be applied to ensure this duty was carried out.

Take the case of chipko movement. In chipko movement, large population of people in a village in Uttrakahand grabbed  trees for long time to stop the cutting of trees by Britishers. This movement results in showing the truth of cutting trees in the whole world and became very popular in the entire world and till date people refer to this movement