Global warming is mainly caused because of deforestation and pollution. The main cause for this is the growing human needs. It is our responsibility to protect our Earth which provides us everything to live prosperously.
If our Earth is not protected, it would be very difficult for our children and future generations to live a healthier life. The toxic levels in water and air are increasing in a large ratio every year which will lead to various medical conditions such as skin diseases & brain disorders. These harmful greenhouse gases (Carbon-di-oxide being the major greenhouse gas) can be absorbed only by trees. A well grown tree can absorb approximately one ton of carbon dioxide (the major "greenhouse gas").
So, please start planting trees and preserve them. Make this Earth a safe and healthy place for our future generations to live.