Human beings' selfish acts like dumping waste materials into water bodies and deforestation will all lead to global warming. If humans do not stop their doings right now, no sooner they will realize that Earth is no longer suitable environment they could live in. Temperature and water level of the Earth rose and she will be " died ".
We should plant more trees and stop deforestation. Using environment-friendly products, taking the public transport are also some ways to save the Earth. Always remember to Reuse, Recycle and Reduce.