Climate change has emerged as a threat to the entire globe and the Intergovernmental Panel on Climate Change (IPCC) has iterated that it needed immediate action to prevent it otherwise it would lead to mass destruction (IPCC, 2007). A majority of nations, particularly developing nations, of the world have been affected and their economic growth has also been devastated by the impacts of climate change. According to the IPCC, climate change refers to any change in climate over time, whether due to natural variability or as a result of human activity (IPCC, 2001). Therefore climate change is partly due to the natural variability and partly due to the human activity. There have been drastic changes in the patterns of climate in the last half century like immediately increases in temperature after 70’s (IPCC, 2001) which can be attributed to human activities like emitting green house gasses (GHGs) into the atmosphere that are responsible for most of the warming of at least last 50 years (IPCC, 2001).

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