global warming. Earth because to retain its force of gravity on its surface to air and seawater, and put in motion by air and sea in relation to the planet's surface energy is needed as a primary source is the sun, which emits in all directions a flow of light visible or near visible radiation in the areas of ultraviolet and infrared.
Earth receives only a small amount of energy emitted by the sun The sun is not used directly but as heat, therefore, necessary that the atmosphere transforms the thermal energy solar wind into mechanical energy. The heat source for the atmosphere is the soil surface heated by sunlight which is then emitted as infrared radiation into space.
The term applied to the Earth refers to possible global warming due to the accumulation of greenhouse gases caused by human activity, especially since the industrial revolution and the burning of fossil fuels and the production of new chemicals.
Although it was known the greenhouse effect during the first half of the twentieth century, Earth scientists did not consider it a problem of global stability, since before the oceans were considered absorb the carbon dioxide forming calcium carbonate (CaCO3) that fall into the sea without causing any damage.
Infrared radiation is absorbed more by water vapor, carbon dioxide is followed and then the ozone, but these 3 chemical compounds is carbon dioxide which produces more greenhouse gases because the man is increasing their concentration as a result of the activities.
is considered that without the greenhouse effect produced by the natural carbon dioxide from Earth's temperature would be around 20 degrees Celsius (- 20 ° C).
Source: www.sagan-gea.org/hojared/Hoja15.htm
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