Global warming refers to a natural process that takes place over millions of years. It causes the climate of the world to change, with an increase in temperature. However due to the enhanced greenhouse gas effect, the pace of global warming is much quicker. This has resulted in almost a 1? Celsius increase in temperature. The enhanced greenhouse effect refers to the exponential increase in the amount of greenhouse gases emitted. This results in greater insolation of the shortwave radiation from the sun, thus resulting in an increase in temperature. Factors causing this enhanced greenhouse effect include the industrial revolution, urbanisation and deforestation. However urbanisation is the main anthropogenic factor causing global warming. Urbanisation causes an increased enhanced greenhouse gas effect, resulting in global warming. Urbanisation refers to the movement of people from rural areas to cities. This results in an increase in the population of the cities, thereby placing a strain on its resources, causing it to expand. An average urban household emits 100 kg of carbon more than a rural household annually. This means that there is a greater emission of greenhouse gasses like carbon dioxide. Moreover, as more people move to cities, a greater amount of land is needed to build houses. This means that the city will have to use much more energy in terms of providing a better form of public transport and more amenities. Also, they would have to use more money and energy to build homes for the newcomers. All these activities result in an increased emission of greenhouse gases. With increased affluence, people in cities invest in automobiles, air-conditioning or in basic amenities like refrigerators or televisions. These appliances are what is normally known as energy guzzlers. That means that the city as a hole emits much more greenhouse gasses and this results in an even greater enhanced greenhouse gas effect. The industrial revolution