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GREENHOUSE EFFECT
The greenhouse effect is a natural phenomenon that is part of the regulatory mechanisms thermal equilibrium of a planet or a satellite due to the presence of an atmosphere containing certain gases known indeed greenhouse gases. These, for their specific molecular properties, are transparent to incoming solar radiation long-wave, while reflect, absorb and re-broadcast or infrared radiation. The name derives from an analogy with what happens in greenhouses for cultivation. The sun's rays penetrate the atmosphere and the courts reach the surface of the planet where they are partly reflected and partly absorbed by the surface, those retained are converted into heat. To give an idea of the phenomenon, in the absence of greenhouse gases, the equation of equilibrium between the incoming and outgoing radiation is that the Earth's average surface temperature would be about -18 ° C while, thanks to the presence of greenhouse gases in the first place and the rest of the atmosphere, the real value / actual is around +14 ° C, ie much above the freezing point of water thus allowing life as we know it. The greenhouse effect is manifested as an alteration of the budget, therefore, thermal - radiation at the surface. It is important to note that the water vapor form, is itself the most potent greenhouse gases and air pollution caused by burning fossil fuels for energy and agriculture industrialized tropical deforestation which leads to a rise in greenhouse gas the atmosphere in particular carbon dioxide (CO2), methane (CH4), nitrous oxide or nitrous oxide (N2O) and ozone (O3) thus raising the natural greenhouse effect of an anthropogenic component.