Trees existed even before human beings evolved.We all were taught the importance of having trees and how our survival is dependant on their survival. Trees absorb CO2 released in the environment and release Oxygen in turn which is what we inhale to survive. Now, imagine a world without trees and you can imagine how horrific it would be. Green cover is not only important just for our survival but for all other living species on this planet. It is important to have a balance between green cover and things we do in the name of development. Trees not only act as a supplier of oxygen but also helps in reducing the rate of soil erosion.