What do the following have in common:
Dr. David Viner, a senior research scientist at the climatic research unit (CRU) of the University of East Anglia, Adam Watson, from the Centre for Ecology and Hydrology in Banchory, Aberdeenshire, Dr. Morris Bender, from NOAA, Steve Running, a wildfire expert, ecologist and forestry professor at the University of Montana, Dr. Felix Landerer of the Max Planck Institute for Meteorology in Hamburg, Germany, Dr. Jerry Mitrovica, professor of geophysics at Harvard University, Prof. Wieslaw Maslowski from Dept. Oceanography of the US Navy , NASA climate scientist Jay Zwally, University of Manitoba Prof. David Barber, Mark Serreze, director of the NSIDC, Prof. Peter Wadhams, head of the polar ocean physics group at the University of Cambridge (UK), James Hansen, NASA scientist, Noel Brown, director of the New York office of the U.N. Environment Program (UNEP), Janos Bogardi, director of the Institute for Environment and Human Security at the United Nations University in Bonn and the United Nations Environment Program (UNEP), Cristina Tirado, from the Institute of the Environment and Sustainability at UCLA, Dr. John Holdren, director of the Office of Science and Technology Policy for the Obama administration then a professor at U.C. Berkeley
Hint: They are by no means alone.