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In present time climate change has been recognized as the foremost environmental problem of the twenty first century and has become a subject of considerable debates. It is predicted to lead to adverse, irreversible impact on earth and the ecosystem as a whole. Although it is difficult to connect specific weather events to global warming, increase in global temperatures has been predicted to cause border changes, including glacial retreat, arctic shrinkage, and worldwide sea level rise. Climate change has been implicated in mass mortalities of mail, aquatic species, including plants. Climate change is an emerging threat to global public health in many ways including heat stress, air pollution, food scarcity and spread of infectious diseases and intensity of disease outbreaks. Thus, ‘Global Climate Change’ has been a major issue that has created global concern and this has been highlighted by awarding the 2007 Nobel Peace Prize for this cause, on the Inter-Governmental Panel of Climatic Change (IPCC) and Albert Arnold (M) Gore JR., the former American Vice-President, jointly. Global warming is being proven as the major reason behind the climate change. Fossil fuels are being continuously used to produce electricity. The burning of these fuels produces gases like carbon dioxide, methane and nitrous oxides which lead to global warming. Deforestation is also leading to warmer temperatures. The hazard of global warming is continuously causing major damage to the earth’s environment. The present paper focuses on different aspects of ‘Global Climate Change’; the causes, predicted impacts. Probable steps for mitigation and the need for greater understanding of climate change and bringing global awareness on the issue.