چکیده :

Greenhouse gases have an important role in understanding earth climate history. Based on these studies greenhouse effect which produces heat due to trapping of heat by greenhouse gases in adjusting earth temperature, Climate change refers to the oscillations in earth global or regional climate in time interval and defines those changes that fluctuate with mean atmospheric conditions or average weather (common) in timescale intervals which fluctuate between decades to million years. Researches and specialists believed that with using of pure energies like solar, windy and heat ground energy and etc, instead of energies cause by fossil fuels will impede of environmental protection implication. So the average volume of light shining at a day is 4 kilowatt H/m2 and the average volume of sunny hour is more than 2800 hour at a year. These changes may have been resulted from earth internal processes or forces beyond it or in recent times due to activities related to the man-made climatically changes. Especially in recent application in the subject of environment policy, the expression of; climate change; often refers to the current changes in new climate.

کلید واژگان :

Environment, Climate, Weather, Greenhouse Gases.



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