Introduction: The earth is a closed system. The term ��closed system,�� means that earth is continuously receiving heat, mainly from, sun while less goes out making it closed system. This quality is due to the atmosphere surrounding the earth. The atmosphere consists of various gases like Nitrogen, Carbon dioxide, Oxygen, Water vapour, etc. Some of these gases like carbon dioxide, water vapour, etc act as heat entrapping gases. These gases are definitely required to certain extent to keep the earth warm. This is called Greenhouse Effect. But when these gases are present in more amounts it increases the risk of raising the average temperature of earth. This increase of average temperature of earth, which changes the climate, is known as GLOBAL WARMING. The main reason for global warming are: 1. The amplification of the Greenhouse effect caused due to the higher concentration of greenhouse gases gas in the air, gives rise to heat entrapment. In recent years, concentration of CO2 has increased drastically. From last 420,000 years the concentration was fairly stable at 280 p......

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