How to make earth a pollution free environment?

Now in this world,i think that scientists and other people have found various alternatives,to reduce pollution at about 50 to 60%.But,the thing is we have take those alternatives in our daily use. I think every person has to think to reduce pollution.
Still,it will take time to get to those alternatives.

We ourselves keep away from all polluting activities.Also advice others to follow.

Plant a tree and just avoid use of plastic covers and more mount of fuel..
Dispose your all kind of waste properly...

Reduce cutting trees and try to plant more and more trees. Reduction in cutting also helps in reducing pollution.

Increasing greenery on earth by planting more and more trees as trees are like lungs of a human being.Also finding proper way of disposing the waste materials is one of the ways.

Each and every person in the earth should think about it.Then only,a pollution free environment will be achieved.