Global warming is the process in which the average temperature of air near the surface of Earth over the past one to two centuries has been increased. The people who do research on climate have collected information about the various processes that cause winds and storms. They have also researched on the processes of water downfall and temperature. Moreover they have also gathered the details of related influences of the increased temperature on climate. Ocean currents and chemical composition of atmosphere has also been changed. Since the beginning of geologic time the climate of earth has changed to a conceivable degree and the responsibility falls on Industrial Revolution – which completely integrates the human activities. (USNRC, 2008)
Over the issue of rising of surface temperatures and the bad effects of past and future warming on human life there is debate in every corner of the world and stress is being laid on the need for actions mandatory to reduce future warming and its consequences. The debate includes the points of considering in this regard the causes of rise of air temperature near the surface of earth along with the factors that have influenced a lot. There could be some social impacts and role of public policy of urbanization.