IPCC Report Calls Climate Changes Unprecedented

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Abstract

Warming of the Earth's climate “is unequivocal and since the 1950s many of the observed changes are unprecedented over decades to millennia,” according to a new assessment report by the Intergovernmental Panel on Climate Change (IPCC). The 27 September summary for policy makers of IPCC's report “Climate Change 2013: The Physical Science Basis” also states that “it is extremely likely that human influence has been the dominant cause of the observed warming since the mid-20th century.”