Global warming is the increase in average global temperature due to increase in amount of green house effects in the earth’s atmosphere. The average global temperature is 15 degree centigrade which is maintained due to presence of certain gases like Carbon dioxide, methane, water vapor, nitrous oxide and chlorofluro carbon present with troposphere. The gages are collectively called heat trapping or green house gages. Lanth’s temperature is maintained by traditional infer-red (heat) radiation by these Green House effects which prevent heart from escaping to outer space, so one functionality comparable to glass panels of a green house which keep carbon dioxide concentration higher and so higher temperature inside the green house. So the effect is called Green House effect.