Global warming and climate change are topics of concern world over. The global warming potential is the warming impact of a green house gas (GHG). The green house gases are trace gases present in atmosphere that control energy flow in the atmosphere by absorbing infra-red radiation. Some GHGs occur naturally while others result from human activities called as anthropogenic GHG. There are six GHGs under the Kyoto Protocol i.e. carbon dioxide (CO2), methane (CH4), nitrous oxide (N2O), hydroflurocarbons (HFCs), per fluorocarbons (PFCs), and sulphur hexafluoride (SF6).