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Global warming is the long-term increase in the average temperature of the Earth s climate system. It is a primordial aspect of current climate change, demonstrated by direct measurement of temperature and various effects of heating. [2] [3] The global warming terms and climate change are often used indistinctly, [4] but more precisely global warming is the overall increase in surface temperatures and its projected increase predominantly caused by human activities (anthropic), [5] While climate change includes both global warming and its climate effects. [6] While there have been prehistoric periods of global warming, [7] several of the changes observed since the mid-twentieth century have not had precedents from decades to millennia. [2] [8] In 2013, the Fifth Evaluation Report (AR5) of the Intergovernmental Group of Experts on Climate Change (IPCC) concluded that human influence is extremely likely that human influence has been the dominant cause of heating observed from the middle o...