Global warming is the observed century scale rise in the average temperature of the earth climate system and its related effects as part of climate change. It is very dangerous phenomenon present in human life. The term global warming and climate change are used interchangeably; a 2008 NASA article defines global warming as “The increase in Earths average temperature due to rising levels of greenhouse gases and climate change as a long-term change in global warming. The largest human influence has been the emission of greenhouse gases such a carbon dioxide methane and nitrous oxide. Climate model projections summarized in the report indicated that during the 21st century.