In natural sunlight coming into the earth, some will be reflected back by the earth's surface into space. Part of the reflected sunlight would be absorbed by gases in the atmosphere that surrounds the earth-called greenhouse gases, so that the beam is trapped in the earth. This event is known as the greenhouse effect (ERK) because of events similar to the greenhouse, where the heat will get trapped in it, can not penetrate to the outside of the glass, so it can warm the whole house of glass.
These natural events cause the Earth to warm and decent human being occupied, because if there is no greenhouse effect (ERK), the earth's surface temperature will 33 degrees Celsius cooler. Greenhouse gas (GHG) emissions such as CO2 (Carbon dioxide), CH4 (Methane) and N2O (Nitrous Oxide), HFCs (Hydrofluorocarbons), PFCs (perfluorocarbons) and SF6 (Sulphur hexafluoride) situated in the atmosphere resulting from human activities, especially the associated with the burning of fossil fuels (oil, gas, and coal) as in power generation, motor vehicles, air conditioners, computers, cooking. In addition Greenhouse Gas (GHG) emissions are also produced from the combustion and deforestation as well as agricultural and livestock activities. Greenhouse gas (GHG) emissions resulting from these activities, such as carbon dioxide, methane, and nitrous oxide, leading to increased concentrations of greenhouse gases (GHG) emissions in the atmosphere.
The changing composition of Greenhouse Gases (GHG) emissions in the atmosphere, namely the increasing concentration of greenhouse gases (GHGs) globally due to human activities cause the sunlight that is reflected back by the earth's surface into space, mostly trapped inside the earth due to hampered by the Greenhouse Gas ( GHG) earlier.Increasing the amount of greenhouse gas (GHG) emissions in the atmosphere ultimately led to increased average temperature of the earth's surface, which became known as Global Warming.
The sun's rays are not absorbed by the earth's surface will be reflected back from the earth's surface into space. Once the change is reflected back into the form of long wave heat energy. But some of that heat energy can not penetrate or pass back out into space, because the layer of atmospheric gases has been disturbed composition. As a result of heat energy that should escape into space (stratosphere) to be radiated back into the earth's surface (the troposphere) or presence of additional heat energy back to earth within a period of time, so it is more than the normal conditions, this is the excessive greenhouse effect due to the composition of the coating greenhouse gases in the atmosphere is disturbed, consequently trigger a rise in average temperature of the surface of the earth then there is global warming.
According to the simulation calculation, the greenhouse effect has increased the Earth's average temperature of 1-5 ° C. If the trend of increasing greenhouse gases will remain as it is now global warming causes an increase between 1.5 to 4.5 ° C around the year 2030.With increasing concentration of CO2 in the atmosphere, the more heat waves reflected from the surface of the earth's atmosphere is absorbed. This will result in the earth's surface temperature to rise.
http://mbojo.wordpress.com/2008/07/17/hubungan-efek-rumah-kaca-pemanasan-global-dan-perubahan-iklim/
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