The introduction of global warming

Until recently, we can hear many people around us are talking about a big issue in the world which we name it as global warming. What is global warming? It is a process in which the earth's temperature starts increasing, the raising of average temperature of the earth's atmosphere due to greenhouse gasses. Greenhouse gasses are made up of Carbon dioxide, methane and nitrous oxide, it stay in the atmosphere and prevent the suns warming rays to leave the earth. Now that global warming is the major environmental issue. Many societies and communities in a lot of places are being changed and are suffering because of the global warming issue. Some scientists say the world will enter a vast drought because of the rising temperature.