Harold Doiron, Ph.D. Chairman, The Right Climate Stuff Research Team (Retired NASA scientists and engineers): A global warming problem does not exist at the present time. There is only a concern that burning fossil fuels may cause harmful temperatures. Potential problems require monitoring, study and contingency plan development. Equilibrium climate snsitivity is not an appropriate climate sensitivity metric for regulatory decisions. Low climate sensitivity and reasonable emissions scenarios lower the Anthropogenic Global Warming threat.
Calvin Beisner, Cornwall Alliance: Chicken Little never takes a vacation when it comes to environmental scares. A spring without birds, overpopulation, mass famines, resource exhaustion, rainforest destruction, mass extinctions, global cooling, acid rain, ozone depletion, global warming … the list could go on and on. Just on the topic of global warming Chicken Little touts a new alarm pretty much every day. What Chris Mooney, eco-alarmist, reports is an interesting fact about what was happening on less than 1/666th of the planet’s surface (And forget about the miles-thick atmosphere or the miles-deep oceans, which together dwarf the surface.) during 1/25th of a year, but it means NOTHING about GLOBAL climate.
Euan Mearns, geologist: He takes a close look at the data on temperatures, carbon dioxide (CO2), and methane (CH4) found in the Vostok Ice Core of Antarctica. He focuses on the Eemian warm period between 130,000 and 115,000 years ago. This warm period was the last warm period before the current warm period, the Holocene. In her 2008 graphs showing the relationship between CO2 and temperatures from the Vostok Ice Core covering the entire record, Jo Nova stated the average lag was about 800 years, with temperatures rising (falling) about 800 years before CO2 rising (falling). This lag indicates that CO2 could not be the cause of rise or fall of temperatures.
Stephan Savarese, research engineer. President of Sauvons le Climat, Saving Our Planet: https://savingourplanet.net: Whatever the reasons for climate change, it's here and it's big. I name it Climate Transition because Climate Change has become a political issue. Showing pictures of isolated cold episodes in narrow regions of the world is picturesque, but cannot change the accurate, revised, precise statistics, which show that global warming has accelerated (at least) fourfold within the past fifty years, at a rate surprisingly fast and chaotic. As a consequence, ocean level rise, which had stabilized over the past five millennia at 1 mm/year, is on the verge of crossing the 5 mm/year mark, due to accelerated sea water thermal expansion, plus continental glacier melting.
F. Ward Whicker, Emeritus Professor in Department of Environmental and Radiological Health Sciences, Colorado State University. He has spent a lifetime out in the mountains of Colorado year round and also out in nature around the world. He presents his observations about changes in climate and ecosystems with conclusions that these changes are due to CO2 from use of fossil fuels.
Ed Berry, Physicist and Patric Moore, Environmentalist: They both consider that CO2 from human emissions is not causing serious man-made global warming, serious other climate change effects, nor serious rise in ocean levels. In this discussion, they debate which view, logic, reasons are correct for the conclusion that they share about CO2 from human emissions.
Bill Nye the science guy. Will Happer, Emeritus Professor of Physics, Princeton University: “There’s this myth that’s developed around carbon dioxide that it’s a pollutant, but we exhale carbon dioxide with every breath. Each of us emits about two pounds of carbon dioxide a day, so are we polluting the planet?” Happer explained. “The 2016 Paris treaty will not do any good. Anyone who looks at the results of doing what the treaty says can see that the effect on the earth’s climate is — even if you take the alarmist computer models trivial — it will not make any difference and yet it will cause enormous harm to many people.”
Barack Obama, President of the United States: "Few challenges facing America and the world are more urgent than combating climate change. The science is beyond dispute and the facts are clear." "With all due respect Mr. President, that is not true." We, the undersigned scientists, maintain that the case for alarm regarding climate change is grossly overstated.