Causes of Global Warming

Global warming has many causes and most of them are from humans. Until now they founded just 10 causes from human and each of them are for human services which make our life so easy. One of them is that carbon dioxide from power plants. This is the biggest cause of global warming. It work by machine which work by oil to get energy but to get energy you will get also pollution from the exhaust. Another cause is pollution emitted from cars. Any one knows how cars work and also the exhaust from car is makes pollution. Pollution from trucks is also same what happen in the car but with more pollution. Pollution from Airplanes is also same but the airplane have biggest engine which make the pollution is more than cars and trucks. Nitrous Oxide also effects on global warming than carbon dioxide. This Nitrous Oxide are unknown as of now but some scientists said of comes from microorganisms and natural reactions in the earth. On the other hand, some believe if from sun.
Another cause is Deforestation. Todays we have lots of companies cutting tress and when the trees less the CO2 will be more and this makes the pollution increases.