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Consensus On Global Warming
Temperature data from four international science institutions show rapid warming in the past few decades and that the last decade has been the warmest on record.
Ninety-seven percent of climate scientists agree that climate-warming trends over the past century are very likely due to human activities,1and most of the leading
scientific organizations worldwide have issued public statements endorsing this position. The following is a partial list of these organizations, along with links
to their published statements and a selection of related resources.
Observations throughout the world make it clear that climate change is occurring, and rigorous scientific research demonstrates that the greenhouse gases
emitted by human activities are the primary driver.
American Association for the Advancement of Science
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Comprehensive scientific assessments of our current and potential future climates clearly indicate that climate change is real, largely attributable to emissions from human activities, and potentially a very serious problem.
American Chemical Society
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Human-induced climate change requires urgent action. Humanity is the major influence on the global climate change observed over the past 50 years. Rapid
societal responses can significantly lessen negative outcomes.
American Geophysical Union
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Our AMA ... supports the findings of the Intergovernmental Panel on Climate Change’s fourth assessment report and concurs with the scientific
consensus that the Earth is undergoing adverse global climate change and that anthropogenic contributions are significant.
American Medical Association
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It is clear from extensive scientific evidence that the dominant cause of the rapid change in climate of the past half century is human-induced increases in the amount of atmospheric greenhouse gases, including carbon dioxide (CO2), chlorofluorocarbons, methane, and nitrous oxide.
American Meteorological Society
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The evidence is incontrovertible: Global warming is occurring. If no mitigating actions are taken, significant disruptions in the Earth’s physical
and ecological systems, social systems, security and human health are likely to occur. We must reduce emissions of greenhouse gases beginning now.
American Physical Society
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The Geological Society of America (GSA) concurs with assessments by the National Academies of Science (2005), the National Research Council (2006), and
the Intergovernmental Panel on Climate Change (IPCC, 2007) that global climate has warmed and that human activities (mainly greenhouse-gas emissions) account
for most of the warming since the middle 1900s.
The Geological Society of America
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