Footnotes & Sources

The background and pro and con arguments were written by staff based upon input from the following footnotes (directly referenced) and sources (used for general research and not directly referenced):
  1. John Cook, Dana Nuccitelli, Sarah A. Green, Mark Richardson, Barbel Winkler, Rob Painting, Robert Way, Peter Jacobs, and Andrew Skuce, "Quantifying the Consensus on Anthropogenic Global Warming in the Scientific Literature," Environmental Research Letters, May 15, 2013

  2. Nicola Scafetta, "Multi-Scale Harmonic Model for Solar and Climate Cyclical Variation throughout the Holocene Based on Jupiter-Saturn Tidal Frequencies Plus the 11-Year Solar Dynamo Cycle," Journal of Atmospheric and Solar-Terrestrial Physics, May 2012

  3. Shaun A. Marcott, Jeremy D. Shakun, Peter U. Clark, and Alan C. Mix, "A Reconstruction of Regional and Global Temperature for the Past 11,300 Years," Science, Mar. 8, 2013

  4. University of Leicester, "An Ancient Earth Like Ours: Geologists Reconstruct the Earth's Climate Belts between 460 and 445 Million Years Ago,", Aug. 9, 2010

  5. James L. Powell, "Science and Global Warming," (accessed Feb. 19, 2015)

  6. Stephen J. Farnsworth and S. Robert Lichter, "The Structure of Scientific Opinion on Climate Change," International Journal of Public Opinion, Oct. 2011

  7. William R.L. Anderegg, James W. Prall, Jacob Harold, and Stephen H. Schneider, "Expert Credibility in Climate Change," Proceedings of the National Academy of Sciences, July 6, 2010

  8. US Environmental Protection Agency, "The Greenhouse Effect," (accessed Feb. 19, 2015)

  9. Carbon Dioxide Information Analysis Center, "Global Fossil-Fuel CO2 Emissions," (accessed Feb. 19, 2015)

  10. NOAA Earth System Research Laboratory, "Trends in Atmospheric Carbon Dioxide," (accessed Feb. 19, 2015)

  11. Bobby Magill, "Arctic Methane Emissions 'Certain to Trigger Warming,'", May 1, 2014

  12. Euan G. Nisbet, Edward J. Dlugokencky, and Philippe Bousquet, "Methane on the Rise – Again," Science, Jan. 2014

  13. US Environmental Protection Agency, "Overview of Greenhouse Gases," (accessed Feb. 19, 2015)

  14. Dave S. Reay, Eric A. Davidson, Keith A. Smith, Pete Smith, Jerry M. Melillo, Frank Dentener, and Paul J. Crutzen, "Global Agriculture and Nitrous Oxide Emissions," Nature Climate Change, June 2012

  15. Rob Monroe, "What Does This Number Mean?,", Apr. 2013

  16. US Global Change Research Program, "US National Climate Assessment,", May 2014

  17. Rob Monroe, "What Does 400 PPM Look Like?,", Dec. 3, 2013

  18. US Environmental Protection Agency, "Overview of Greenhouse Gases: Carbon Dioxide Emissions," (accessed Feb. 19, 2015)

  19. US Environmental Protection Agency, "Greenhouse Gas Inventory Data Explorer," (accessed Feb. 19, 2015)

  20. United Nations Environment Programme, "Giant Cube in Copenhagen Helps Visualize One Tonne of CO2,", Dec. 8, 2009

  21. Berkeley Earth, "Summary of Findings," (accessed Feb. 20, 2015)

  22. Richard A. Muller, "The Conversion of a Climate-Change Skeptic,", July 28, 2012

  23. Michael E. Mann, Zhihua Zhang, Malcolm K. Hughes, Raymond S. Bradley, and Sonya K. Miller, et al., "Proxy-Based Reconstructions of Hemispheric and Global Surface Temperature Variations over the past Two Millennia," Proceedings of the National Academy of Sciences, Sep. 9, 2008

  24. Intergovernmental Panel on Climate Change (IPCC), "Climate Change 2014 Synthesis Report: Summary for Policymakers,", 2014

  25. Oregon State University, "Earth Warmer Today than During 70 to 80 Percent of the Past 11,300 years," ScienceDaily, Mar. 7, 2013

  26. Andrew P. Schurer, Simon F. B. Tett, and Gabriele C. Hegerl, "Small Influence of Solar Variability on Climate over the Past Millennium," Nature Geoscience, Dec. 22, 2013

  27. T. Sloan and A.W. Wolfendale, "Cosmic Rays, Solar Activity and the Climate," Environmental Research Letters, Nov. 7, 2013

  28. National Oceanic and Atmospheric Administration, "Global Surface Temperature," (accessed Apr. 13, 2010)

  29. Intergovernmental Panel on Climate Change (IPCC), "Climate Change 2013: The Physical Science Basis,", 2013

  30. Kristina Pistone, Ian Eisenman, and V. Ramanathan, "Observational Determination of Albedo Decrease Caused by Vanishing Arctic Sea Ice," Proceedings of the National Academy of Sciences, Mar. 4, 2014

  31. Julie Brigham-Grette, Martin Melles, Pavel Minyuk, Andrei Andreev, and Pavel Tarasov, et al., "Pliocene Warmth, Polar Amplification, and Stepped Pleistocene Cooling Recorded in NE Arctic Russia," Science, June 21, 2013

  32. Kurt Lambeck, Hélène Rouby, Anthony Purcell, Yiying Sun, and Malcolm Sambridge, "Sea Level and Global Ice Volumes from the Last Glacial Maximum to the Holocene," Proceedings of the National Academy of Sciences, Oct. 28, 2014

  33. Oliver Milman, "Sea Level Rise over Past Century Unmatched in 6,000 Years, Says Study,", Oct. 13, 2014

  34. S. Jevrejeva, A. Grinsted, and J.C. Moore, "Upper Limit for Sea Level Projections by 2100," Environmental Research Letters, Oct. 10, 2014

  35. Climate Central, "New Analysis Shows Global Exposure to Sea Level Rise,", Sep. 23, 2014

  36. US Government Accountability Office, "Ocean Acidification: Federal Response Under Way, but Actions Needed to Understand and Address Potential Impacts,", Sep. 2014

  37. World Meteorological Organization, "WMO Greenhouse Gas Bulletin,", Sep. 9, 2014

  38. Ove Hoegh-Guldberg and John F. Bruno, "The Impact of Climate Change on the World’s Marine Ecosystems," Science, June 18, 2010

  39. UNEP Convention on Biological Diversity, "An Updated Synthesis of the Impacts of Ocean Acidification on Marine Biodiversity,", 2014

  40. W. Llovel, J.K. Willis, F.W. Landerer, and I. Fukumori, "Deep-Ocean Contribution to Sea Level and Energy Budget Not Detectable over the Past Decade," Nature Climate Change, Oct. 2014

  41. Paul J. Durack, Peter J. Gleckler, Felix W. Landerer, and Karl E. Taylor, "Quantifying Underestimates of Long-Term Upper-Ocean Warming," Nature Climate Change, Oct. 2014

  42. Magdalena A. Balmaseda, Kevin E. Trenberth, and Erland Källén, "Distinctive Climate Signals in Reanalysis of Global Ocean Heat Content," Geophysical Research Letters, May 2013

  43. The Earth Institute Columbia University, "Is Global Heating Hiding Out in the Oceans?,", Oct. 31, 2013

  44. National Snow and Ice Data Center (NSIDC), "Glaciers and Climate Change," (accessed Feb. 23, 2015)

  45. University of Innsbruck, "Human Contribution to Glacier Mass Loss Increasing, " ScienceDaily, Aug. 14, 2014

  46. American Meteorological Society, "Explaining Extreme Events of 2013 from a Climate Perspective," Bulletin of the American Meteorological Society, Sep. 2014

  47. James Hansen, Makiko Sato, and Reto Ruedy, "Perception of Climate Change," Proceedings of the National Academy of Sciences, Sep. 11, 2012

  48. Kate Marvel and Céline Bonfils, "Identifying External Influences on Global Precipitation," Proceedings of the National Academy of Sciences, Nov. 26, 2013

  49. Intergovernmental Panel on Climate Change (IPCC), "Climate Change 2014: Impacts, Adaptation, and Vulnerability,", 2014

  50. Bobby Magill, "Arctic Methane Emissions 'Certain to Trigger Warming,'", May 1, 2014

  51. NOAA National Climatic Data Center, "What Are Positive Feedbacks?," (accessed Feb. 23, 2015)

  52. Susan M. Natali, Edward A.G. Schuur, Elizabeth E. Webb, Caitlin E. Hicks Pries, and Kathryn G. Crummer, "Permafrost Degradation Stimulates Carbon Loss from Experimentally Warmed Tundar," Ecology, Mar. 2014

  53. United Nations Environment Programme (UNEP), "Policy Implications of Warming Permafrost,", 2012

  54. Popular Technology, "1350+ Peer-Reviewed Papers Supporting Skeptic Arguments against ACC/AGW Alarmism,", Feb. 12, 2014

  55. Climate Depot, "More than 1000 International Scientists Dissent over Man-Made Global Warming Claims,", Dec. 8, 2010

  56. 15 Scientists "Scientists Respond to the Obama Administration's National Climate Assessment– 2014,", May 15, 2014

  57. Joseph Bast, "The Myth of the 98 Percent,", Oct. 2012

  58. Joseph Bast and Roy Spencer, "The Myth of the Climate Change '97%,’", May 26, 2014

  59. Leif Kullman, "Ecological Tree Line History and Palaeoclimate - Review of Megafossil Evidence from the Sweedish Scandes," Boreas, 2013

  60. Patrick Moore, "Natural Resource Adaptation: Protecting Ecosystems and Economies,", Feb. 25, 2014

  61. Rob Monroe, "How Much CO2 Can the Oceans Take Up?,", July 3, 2013

  62. Sean M. McMahon, Geoffrey G. Parker, and Dawn R. Miller, "Evidence for a Recent Increase in Forest Growth," Proceedings of the National Academy of Sciences, Feb. 23, 2010

  63. Craig D. Idso, "A New Propaganda Film by the NRDC Fails the Acid Test of Real World Data,", Jan. 5, 2010

  64. A.P. Ballantyne, C.B. Alden, J.B. Miller, P.P. Tans, and J.W.C. White, "Increase in Observed Net Carbon Dioxide Uptake by Land and Oceans during the Past 50 Years," Nature, Aug. 2012

  65. Marc Morano, "New Peer-Reviewed Scientific Studies Chill Global Warming Fears,", Aug. 20, 2007

  66. William Happer, "Climate Science in the Political Arena,", May 20, 2010

  67. Nongovernmental International Panel on Climate Change (NIPCC), "Climate Change Reconsidered II: Physical Science,", Sep. 2013

  68. O.M. Raspopov, V.A. Dergachev, G.I. Zaitseva,and M.G. Ogurtsov, "Deep Solar Activity Minima, Sharp Climate Changes, and Their Impact on Ancient Civilizations," Geomagnetism and Aeronomy, Dec. 2013

  69. W.J.R. Alexander and F. Bailey, "Solar Activity and Climate Change - A Summary," Energy & Environment, Nov. 2007

  70. Willie Soon and David R. Legates, "Solar Irradiance Modulation of Equator-to-Pole (Arctic) Temperature Gradients: Empirical Evidence for Climate Variation on Multi-Decadal Timescales," Journal of Atmospheirc and Solar-Terrestrial Physics, Dec. 13, 2012

  71. Nicola Scafetta, "Multi-Scale Harmonic Model for Solar and Climate Cyclical Variation throughout the Holocene Based on Jupiter-Saturn Tidal Frequencies Plus the 11-Year Solar Dynamo Cycle," Journal of Atmospheric and Solar-Terrestrial Physics, 2012

  72. Ross R. McKitrick, "HAC-Robust Measurement of the Duration of a Trendless Subsample in a Global Climate Time Series," Open Journal of Statistics, Aug. 2014

  73. Richard Lindzen, "MIT Climate Scientist Dr. Richard Lindzen Rips UN IPCC Report,", Sep. 28, 2013

  74. Qian WeiHong and Lu Bo, "Periodic Oscillations in Millennial Global-Mean Temperature and Their Causes," Chinese Science Bulletin, Dec. 2010

  75. Richard S. Lindzen and Yong-Sang Choi, "On the Observational Determination of Climate Sensitivity and Its Implications," Asia-Pacific Journal of Atmospheric Sciences, 2011

  76. Nicholas Lewis and Judith A. Curry, "The Implications for Climate Sensitivity of AR5 Forcing and Heat Uptake Estimates," Climate Dynamics, Sep. 25, 2014

  77. Roy W. Spencer, "95% of Climate Models Agree: The Observations Must be Wrong,", Feb. 7, 2014

  78. Tim Ball, "A Simple Truth; Computer Climate Models Cannot Work,", Oct. 16, 2014

  79. Willem P. de Lange and Robert M. Carter, "Sea-Level Change: Living with Uncertainty,", 2014

  80. Judith Curry, "Slowing Sea Level Rise,", Apr. 24, 2014

  81. Michael D. Lemonick, "Freeman Dyson Takes on the Climate Establishment,", June 4, 2009

  82. M.R. Palmer, P.N. Pearson, and S.J. Cobb, "Reconstructing Past Ocean pH-Depth Profiles," Science, Nov. 1998

  83. Fred Pearce, "Claims Himalayan Glaciers Could Melt by 2035 Were False, Says UN Scientist,", Jan. 21, 2010

  84. I.M. Bahuguna, B.P. Rathore, Rupal Brahmbhatt, Milap Sharma, Sunil Dhar, et al., "Are the Himalayan Glaciers Retreating?," Current Science, Apr. 2014

  85. Eric J. Steig, Qinghua Ding, James W. C. White, Marcel Küttel, Summer B. Rupper, et al., "Recent Climate and Ice-Sheet Changes in West Antarctica Compared with the Past 2,000 Years," Nature Geoscience, Apr. 14, 2013

  86. Brett Smith, "Antarctic Glacial Melt Part of a Natural Cycle, Says New Study,", Apr. 15, 2013

  87. Larry Bell, "Receding Swiss Glaciers Inconveniently Reveal 4000 Year Old Forests - and Make It Clear That Glacier Retreat Is Nothing New,", Aug. 8, 2014

  88. Don J. Easterbrook, "Global Cooling Is Here,", June 28, 2014

  89. Philip J. Klotzbach and William M. Gray, "Qualitative Discussion of Atlantic Basin Seasonal Hurricane Activity for 2014,", Dec. 10, 2013

  90. Judith Curry, "Climate Change, Extreme Weather Linked(?) at Last,", June 30, 2011

  91. Ezra Klein, "Al Gore Explains Why He's Optimisitic about Stopping Global Warming,", Aug. 21, 2013

  92. Richard S. Lindzen, "The Political Assault on Climate Skeptics,", Mar. 4, 2015

  93. Craig D. Idso, "Extreme Weather Events: Are They Influenced by Rising Atmospheric CO2?,", Sep. 10, 2014

  94. NOAA National Climactic Data Center, "Annual Global Analysis for 2014 ,", Jan. 2015

  95. Nongovernmental International Panel on Climate Change (NIPCC), "Climate Change Reconsidered II: Biological Impacts,", 2014

  96. Lyle Denniston, "Opinion Analysis: EPA Mostly Wins, but with Criticism,", June 23, 2014

  97. Christopher Monckton, Willie W.H. Soon, David R. Legates, and William M. Briggs, "Why Models Run Hot: Results from an Irreducibly Simple Climate Model," Science Bulletin, Jan. 2015

  98. National Research Council of the National Academies, "Surface Temperature Reconstructions for the Last 2,000 Years,", 2006

  99. National Oceanic and Atmospheric Administration (NOAA), "Global Climate Change Indicators,", Apr. 13, 2010

  100. National Aeronautics and Space Administration (NASA), "Global Climate Change: How Do We Know," (accessed Apr. 7, 2015)

  101. Robert Andres, and Gregg Marland, et al., "Carbon Dioxide Emissions from Fossil Fuel Consumption and Cement Manufacture, 1751-1991," Oak Ridge National Laboratory, May 23, 1994

  102. Intergovernmental Panel on Climate Change (IPCC), "Climate Change 2007: Working Group I: The Physical Science Basis,", 2007

  103. US Global Change Research Program, "Global Change Impacts in the United States,", 2009

  104. Tihomir Novakov, et al., "Aerosol Organic Carbon to Black Carbon Ratios: Analysis of Published Data and Implications for Climate Forcing," Journal of Geophysical Research, Nov. 8, 2005

  105. Julienne Stroeve, et al., "Arctic Sea Ice Decline: Faster than Forecast," Journal of Geophysical Research, May 1, 2007

  106. John A. Church, and Neil J. White, "A 20th Century Acceleration in Global Sea-Level Rise," Geophysical Research Letters, Jan. 6, 2006

  107. James P. Barry, "Marine Organisms and Ecosystems in a High CO2 Ocean," Monterey Bay Research Institute, Apr. 22, 2010

  108. National Research Council, "Ocean Acidification: A National Strategy to Meet the Challenges of a Changing Ocean,", 2010

  109. Johannes Oerlemans, "Deriving Global Temperature from Glacier Length Records," (accessed May 6, 2010)

  110. World Glacier Monitoring Service, "Preliminary Glacier Mass Balance Data 2007/2008," (accessed Apr. 27, 2010)

  111. Tim P. Barnett, et al., "Human-Induced Changes in the Hydrology of the Western United States," Science, Feb. 22, 2008

  112. Andrew Dessler, et al., "Water-Vapor Climate Feedback Inferred from Climate Fluctuations, 2003–2008," Geophysical Research Letters, Oct. 2008

  113. National Aeronautcs and Space Administration (NASA), "Water Vapor Confirmed as Major Player in Climate Change,", Nov. 17, 2008

  114. Arthur B. Robinson, et al., "Environmental Effects of Increased Atmospheric Carbon Dioxide," Journal of American Physicians and Surgeons, Fall 2007

  115. Willie Soon and Sallie Baliunas, "Proxy Climatic and Environmental Changes of the Past 1000 Years," Climate Research, 2003

  116. Anders Moberg, et al., "Highly Variable Northern Hemisphere Temperatures Reconstructed from Low and High Resolution Proxy Data," Nature, Feb. 2005

  117. Nicholas Caillon, and Jeffrey P. Severinghaus, et al., "Timing of Atmospheric CO2 and Antarctic Temperature Changes across Termination III," Science, Mar. 14, 2003

  118. US Senate Minority Environment and Public Works Committee, "US Senate Report: Over 400 Prominent Scientists Disputed Man-Made Global Warming Claims in 2007," epw.senate.go, Dec. 20, 2007

  119. Richard S. Lindzen, "Testimony of Richard S. Lindzen before the Senate Environment and Public Works Committee,", May 2, 2001

  120. Keith Sherwood and Craig Idso, "The Ocean Acidification Fiction,", June 2009

  121. Dennis Ambler, "Acidified Shell Fish: A Distorted View,", Apr. 27, 2010

  122. William Gray, "MIT Professor's Climate Change Op-Ed Proven False,", Apr. 7, 2010

  123. Roy W. Spencer, "Global Warming as a Natural Respose to Cloud Changes Associated with the Pacific Decadal Oscillation (PDO),", Oct. 20, 2008

  124. Petr Chylek, et al., "Arctic Air Temperature Change Amplificaton and the Atlantic Multidecadal Oscillation," Geophysical Research Letters, July 16, 2009

  125. Max Mayfield, "Oversight Hearing on the Lifesaving Role of Accurate Hurricane Prediction," US Senate Committee on Commerce, Science and Transportation Subcommittee on Disaster Prevention and Prediction, Sep. 20, 2005

  126. National Aeronautics and Space Administration (NASA), "John Tyndall (1820-1893)," (June 2, 2010)

  127. G.S. Callendar, "The Artificial Production of Carbon Dioxide and Its Influence on Temperature," Quarterly Journal of the Royal Meteorological Society, Feb. 16, 1938

  128. National Oceanic and Atmospheric Administration (NOAA), "Mauna Loa Carbon Dioxide Record," (accessed June 2, 2010)

  129. Scripps Institution of Oceanography, "Obituary Notice: Climate Science Pioneer: Charles David Keeling,", June 22, 2005

  130. National Academies of Sciences, "Energy and Climate: Studies in Geophysics,", 1977

  131. James Hansen, "The Greenhouse Effect: Impacts on Current Global Temperature and Regional Heat Waves," US Senate Committee on Energy and Natural Resources Hearing, June 23, 1988

  132. James Hansen, et al., "Global Climate Changes as Forecasted by Goddard Institute for Space Studies Three-Dimensional Model," Journal of Geophysical Research, Aug. 20, 1988

  133. Richard A. Kerr, "Greenhouse Skeptic Out in the Cold," Science, Dec. 1, 1989

  134. National Snow and Ice Data Center (NSIDC), "Feedback Loops: Interactions That Influence Arctic Climate," (accessed Apr. 29, 2010)

  135. Intergovernmental Panel on Climate Change (IPCC), "IPCC First Assessment Report,", 1990

  136. United Nations Framework Convention on Climate Change (UNFCCC), "The Intergovernmental Panel on Climate Change," (accessed May 5, 2010)

  137. United Nations (UN), "United Nations Framework Convention on Climate Change,", 1992

  138. US Environmental Protection Agency, "Executive Summary - Inventory of Greenhouse Gas Emissions and Sinks: 1990-2008,", Apr. 15, 2010

  139. United Nations Framework Convention on Climate Change (UNFCCC), "Kyoto Protocol to the United Nations Framework Convention on Climate Change,", 1998

  140. United Nations Framework Convention on Climate Change (UNFCCC), "Kyoto Protocol," (accessed May 6, 2010)

  141. Christiaan Vrolijk, "The Bonn Agreement - The World Agrees to Leave the US on the Sideline,", Aug. 2001

  142. United Nations Framework Convention on Climate Change, "Copenhagen Accord,", Dec. 18, 2009

  143. Al Jazerra English, "Bolivian Climate Summit Gets UN Nod,", Apr. 22, 2010

  144. World People's Conference on Climate Change and the Rights of Mother Earth, "Peoples Agreement,", Apr. 22, 2010

  145. Take Part, "An Inconvenient Truth: About the Film," (accessed Apr. 7, 2015)

  146. Norwegian Noble Committee, "The Nobel Peace Prize 2007,", Oct. 12, 2007

  147. S. Fred Singer, ed., "Nature, Not Human Activity, Rules the Climate,", 2008

  148. Heartland Institute, "About our Conferences," (accessed Apr. 7 2015)

  149. Supreme Court of the United States, Massachusetts v. EPA,, Apr. 2, 2007

  150. US Environmental Protection Agency, "EPA: Greenhouse Gases Threaten Public Health and the Environment,", Dec. 7, 2009

  151. Congressional Budget Office (CBO), "Federal Climate Change Programs: Funding History and Policy Issues,", Mar. 26, 2010

  152. Kyle L. Swanson, George Sugihara, and Anastasios A. Tsonis, "Long-Term Natural Variability and 20th Century Climate Change," Proceedings of the National Academy of Sciences, July 31, 2009

  153. Stephen E. Schwartz, "Uncertainty in Climate Sensitivity: Causes, Consequences, Challenges," Energy and Environmental Science, Aug. 2008

  154. Peter Schwartz and Doug Randall, "An Abrupt Climate Change Scenario and Its Implications for United States National Security,", Oct. 2003

  155. Arthur B. Robinson, et al., "Environmental Effects of Increased Atmospheric Carbon Dioxide," Journal of American Physicians and Surgeons, Fall 2007

  156. Intergovernmental Panel on Climate Change (IPCC), "Headline Statements from the Summary for Policy Makers,", Sep. 27, 2013

  157. Jim Inhofe, "Inhofe Statement on President's National Climate Assessment,", May 6, 2014

  158. Ed Hawkins and Phil Jones, "On Increasing Global Temperatures: 75 Years After Callendar," Quarterly Journal of the Royal Meteorological Society, 2013

  159. United Nations Framework Convention on Climate Change, "Conference of the Parties (COP)," (accessed Mar. 31, 2015)

  160. United Nations Framework Convention on Climate Change, "Report of the Conference of the Parties on its Eighteenth Session,", Feb. 28, 2013

  161. Nick Visser, "Hundreds of Thousands Turn Out for People's Climate March in New York City,", Sep. 21, 2014

  162. Pew Research Center, "Section 7: Global Warming, Environment and Energy,", June 26, 2014

  163. National Snow and Ice Data Center, "Arctic Sea Ice News & Analysis,", Oct. 7, 2014

  164. National Oceanic and Atmospheric Administration, "Arctic Nearly Free of Summer Ice During First Half of 21st Century,", Apr. 12, 2013

  165. National Oceanic and Atmospheric Administration, "Is Sea Level Rising," (accessed Apr. 1, 2015)

  166. National Geographic, "Sea Temperature Rise," (accessed Apr. 1, 2015)

  167. Union of Concerned Scientists, "Hurricanes and Climate Change," (according Apr. 1, 2015)

  168. Andrea Thompson, "Greenland Glaciers More Susceptible to Melt than Thought,", May 18, 2014

  169. United States Geological Service, "Retreat of Glaciers in Glacier National Park," (accessed Apr. 1, 2015)

  170. Intergovernmental Panel on Climate Change (IPCC), "Climate Change 2007: Synthesis Report,", 2007

  171. Lydia Saad, "Republican Skepticism Toward Global Warming Eases," (accessed Apr. 10, 2015)

  172. D. Bray and H. von Storch, "A Survey of the Perspectives of Climate Scientists Concerning Climate Science and Climate Change,", Sep. 2010

  173. Linda Stalker Prokopy, Lois Wright Morton, J. Gordon Arbuckle Jr., Amber Saylor Mase, and Adam K. Wilke, "Agricultural Stakeholder Views on Climate Change: Implications for Conducting Research and Outreach," Journal of the American Meteorological Society, Feb. 2015

  174. E.M. Fischer and R. Knutti, "Anthropogenic Contribution to Global Occurrence of Heavy-Precipitation and High-Temperature Extremes," Nature Climate Change, Apr. 21, 2015

  175. Yale Project on Climate Change Communications, "Yale Climate Opinion Maps," (accessed June 8, 2015)

  176. New York Times, "The Road to a Paris Climate Deal,", Dec. 12, 2015

  177. United Nations Framework Convention on Climate Change, "Summary of the Paris Agreement," (accessed June 2, 2017)

  178. Coral Davenport, "Nations Approve Landmark Climate Accord in Paris,", Dec. 12, 2015

  179. Barack Obama, "Statement by the President on the Paris Climate Agreement,", Dec. 12, 2015

  180. Donald Trump, "Statement by President Trump on the Paris Climate Accord,", June 1, 2017

  181. Michael D. Shear, "Trump Will Withdraw US from Paris Climate Agreement,", June 1, 2017

  182. Alexander C. Kaufman, "Syria Vows to Sign Paris Agreement, Leaving US Alone in Climate Denial,", Nov. 7, 2017

  183. US Global Change Research Program, "Climate Science Special Report,", Nov. 2017

  184. Jonathan Watts, "We Have 12 Years to Limit Climate Change Catastrophe, Warns Un,", Oct. 8, 2018

  185. Umair Irfan, "Report: We Have Just 12 Years to Limit Devastating Global Warming,", Oct. 8, 2018

  186. US Global Change Research Program, "Impacts, Risks, and Adaptation in the United States: Fourth National Climate Assessment, Volume II,", Nov. 2018

  187. Josh Dawsey, Phillip Rucker, Brady Dennis, and Chris Mooney, "Trump on Climate Change: 'People like Myself, We Have Very High Levels of Intelligence but We're Not Necessarily Such Believers,'", Nov. 27, 2018

  188. Cary Funk and Meg Hefferon, "Many Republican Millennials Differ with Older Party Members on Climate Change and Energy Issues,", May 14, 2018

  189. Cary Funk, Brian Kennedy, Meg Hefferon, and Mark Strauss, "Majorities See Government Efforts to Protect the Environment as Insufficient,", May 14, 2018

  190. Lydia Saad, "Global Warming Concern at Three-Decade High in US,", Mar. 14, 2017

  191. National Surveys on Energy and Environment, "As Americans Experienced the Warmest May on Record Their Acceptance of Global Warming Reaches a New High,", July 2018

  192. Anthony Leiserowitz, Edward Maibach, Seth Rosenthal, John Kotcher, Matthew Ballew, Matthew Goldberg, and Abel Gustafson, "Climate Change in the American Mind: December 2018,", Jan. 22, 2019

  193. Anthony Leiserowitz, Edward Maibach, Connie Roser-Renouf, Seth Rosenthal, Matthew Cutler, John Kotcher, "Politics & Global Warming, March 2018,", Mar. 2018