Global warming is the increase in mean temperature of the earth. It is caused by many reasons but it is affecting the world very quickly as the earth is getting hotter by each passing day. There is a prediction that the temperature of the earth will increase by 6 degree centigrade in about hundred years which is a worrying point for all the human beings of the world.

There are many natural reasons for the global warming but global warming caused by humans is also another cause of worry as this has also been established but some scientist still contradict this statement. According to a study the global warming caused by people do the maximum damage. One of the biggest reason for the global warming is the pollution, which is as of now seems inevitable for humans to ignore. One of the main reasons of the global warming caused by humans is the burning of fossil fuel which in turns produces a gas called carbon dioxide and thus it mixes in the air and increases the temperature. 

Mining is another reason for the global warming as coal mining lets the methane to escape in the air which stays naturally inside the earth this is one of the strongest reasons of global warming. Another primary reason for the global warming is the transportation and use of oil for running them. Transportation causes the oil to burn which produces carbon monoxide which is another harmful gas and it gets itself involved in the air resulting in global warming contributed by people. Once the air is polluted with impurities it is impossible to filter it and make it pure therefore the human reasons for global warming needs to be controlled and level of pollution needs to be decreased. Another major reason of global warming created by people is the cutting down of trees as trees give fresh air which is essential to survive but with no trees there will be no fresh air in the atmosphere causing the temperature to rise.  

 The gases used in home appliances like refrigerator and air conditions which are more harmful than CO2 are also reasons of global warming these home appliances have become very common all over the world. The nuclear programs and testing of nuclear warheads are some of the biggest reasons of global warming caused by humans as they produce huge amount of heat in the atmosphere and contributing to the global warming.