Global Warming Causes

Global warming happens because of certain gases, known as greenhouse gases (GHG) that are increasing in the atmosphere because of human and industrial activity. The main GHG is carbon dioxide which is produced because of the use of coal, petroleum and gas as well as by cutting and burning the forests. Nitrous oxide is produced by vehicle and industrial emissions while methane emissions are caused by both industrial and agricultural activities. Chlorofluorocarbons CFCs are highly damaging to the ozone layer as well as being a GHG that affects the globe. These are polluting gases that are increasing in the atmosphere and trapping more heat from the sun. At the same time oceans and vegetation absorb huge amounts of CO2, but their ability to act as 'sinks' is now exceeded by emissions. This means that every year amount of GHGs that stay in the atmosphere increases which makes the heat accelerate. The removal of trees reduces the absorption of carbons by the trees, is responsible for 20% of the increase of carbon emissions. Another factor that enters the circle is water (H2O) that evaporates because of the heat so it acts as GHGs and just warms the weather not blocking the sun's infrared from getting out of the atmosphere therefore more water evaporates which increases the temperature