Matt Ridley, Bjørn Lomborg, Peter Heller, Michael Shellenberger, Thilo Spahl, Ted Nordhaus, James Conca, Boris Kotchoubey, Gerd Held, Patrick Mellor, Götz Ruprecht, Armin Huke, Fabian Herrmann, Kolja Zydatiss, Greg H. Rau, Wil Burns