One of the greatest environmental problems in our time we are facing is global warming. Many researchers believe that excessive emissions of carbon dioxide, as well as other greenhouse gases have a heating impact on the environment and that is very harmful to human existence. Many problems might result from global warming and one of the utmost problem is increasing sea level, This could lead to the flooding of lower lying coastal areas and also cities. Some countries might ever , vanish completely in near future.Global warming also changes the weather patterns. Many areas of the earth are experiencing severe weather condition, drought,Floods and other uncommon weather conditions. Carbon dioxide is major constituent of the environment . It is causing a warming effect on the earth’s surface area . It increases the evaporation of water into the atmosphere.for example- co2,sulphur,CFCs and methane are also responsible for global warming.global warming is a serious problem, we have to take proper initiatives to save this Mother Earth.