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National and international science academies and scientific societies have assessed the current scientific opinion, in particular on recent global warming. These assessments have largely followed or endorsed the Intergovernmental Panel on Climate Change (IPCC) position of January 2001 that states:   An increasing body of observations gives a collective picture of a   warming world and other changes in the climate system... There is new   and stronger evidence that most of the warming observed over the last   50 years is attributable to human activities.[1] Since 2007, no scientific body of national or international standing has maintained a dissenting opinion. Scientific Consensus A question which frequently arises in popular discussion of climate change is whether there is a scientific consensus. Several scientific organizations have explicitly used the term consensus in their statements:      * American Association for the Advancement of Science, 2006: The conclusions in this statement reflect the scientific consensus represented by, for example, the Intergovernmental Panel on Climate Change, and the Joint National Academies' statement. [25]      * US National Academy of Sciences: In the judgment of most climate scientists, Earth’s warming in recent decades has been caused primarily by human activities that have increased the amount of greenhouse gases in the atmosphere. ... On climate change, [the National Academies’ reports] have assessed consensus findings on the science... [89]      * Joint Science Academies' statement, 2005: We recognise the international scientific consensus of the Intergovernmental Panel on Climate Change (IPCC). [90]      * Joint Science Academies' statement, 2001: The work of the Intergovernmental Panel on Climate Change (IPCC) represents the consensus of the international scientific community on climate change science. We recognise IPCC as the world’s most reliable source of information on climate change and its causes, and we endorse its method of achieving this consensus. [91]      * American Meteorological Society, 2003: The nature of science is such that there is rarely total agreement among scientists. Individual scientific statements and papers—the validity of some of which has yet to be assessed adequately—can be exploited in the policy debate and can leave the impression that the scientific community is sharply divided on issues where there is, in reality, a strong scientific consensus.... IPCC assessment reports are prepared at approximately five-year intervals by a large international group of experts who represent the broad range of expertise and perspectives relevant to the issues. The reports strive to reflect a consensus evaluation of the results of the full body of peer-reviewed research.... They provide an analysis of what is known and not known, the degree of consensus, and some indication of the degree of confidence that can be placed on the various statements and conclusions. [92]      * Network of African Science Academies: “A consensus, _base_d on current evidence, now exists within the global scientific community that human activities are the main source of climate change and that the burning of fossil fuels is largely responsible for driving this change.” [21]      * International Union for Quaternary Research, 2008: INQUA recognizes the international scientific consensus of the Intergovernmental Panel on Climate Change (IPCC). [93]      * Australian Coral Reef Society, 2006: There is almost total consensus among experts that the earth’s climate is changing as a result of the build-up of greenhouse gases.... There is broad scientific consensus that coral reefs are heavily affected by the activities of man and there are significant global influences that can make reefs more vulnerable such as global warming.... [94] READ the whole page here: http://en.wikipedia.org/wiki/Scientific_opinion_on_climate_change SEE ALSO: Scientific Consensus on Global Warming http://www.ucsusa.org/ssi/climate-change/scientific-consensus-on.html