The cause of global warming Generally, there are a lot of reasons that can make global warming. The use of excessive fossil fuels too much because of the vehicles are increasing is the main reason. Besides that, livestock and agriculture also have contribution such as using excessive methane gas as the fertilizers. The chemicals in fertilizers can not only damage the air lining, but also the waters, soils, and production of the food. Besides that, the reasons why global warming happen is because the factor of deforestation (land clearing) in big scale to make the public facilities, such as road, school, hospital, and another buildings.