More than 70 speakers will make keynote presentations or participate in panel discussions at the Fourth International Conference on Climate Change, May 16-18, 2010 in Chicago. The following speakers have been confirmed:
 | HABIBULLO I. ABDUSSAMATOV Pulkovo Astronomical Observatory (Russia) |
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 | HON. GEORGE ALLEN Chairman American Energy Freedom Center |
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 | J. SCOTT ARMSTRONG Wharton School of Business University of Pennsylvania |
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 | JOSEPH BAST President The Heartland Institute |
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 | CAL BEISNER Cornwall Alliance |
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| GABRIEL CALZADA King Juan Carlos University |
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 | ALAN CARLIN, PH.D. U.S. Environmental Protection Agency (ret.) |
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| BOB CARTER James Cook University (Australia) |
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| EIGIL FRIIS CHRISTENSEN Danish National Space Institute (Denmark) |
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 | WALTER CUNNINGHAM Fighter pilot, physicist, Apollo 7 astronaut, venture capitalist, author |
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 | JOSEPH D'ALEO International Climate & Environmental Change Assessment Project |
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 | CHRIS DE FREITAS, PH.D. University of Auckland |
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| JAMES DELINGPOLE London Daily Telegraph |
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| SCOTT DENNING Colorado State University |
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| DON EASTERBROOK Western Washington University |
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 | MYRON EBELL Competitive Enterprise Institute |
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 | WILLIS ESCHENBACH |
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| BOB FERGUSON Science and Public Policy Institute |
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 | FRED GOLDBERG, PH.D. Royal Institute of Technology |
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 | LAURENCE GOULD University of Hartford |
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 | WILLIAM GRAY Emeritus Professor of Atmospheric Science Colorado State University |
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 | KESTEN GREEN Monash University |
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 | HOWARD HAYDEN University of Connecticut |
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 | VICTOR HERRERA Institute of Geophysics National Autonomous University of Mexico |
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| CHRIS HORNER Competitive Enterprise Institute |
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| CRAIG IDSO, PH.D. Center for the Study of Carbon Dioxide and Global Change |
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 | ANDREI ILLARIONOV |
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| WILLIAM KININMONTH Australia National Climate Centre (retired) (Australia) |
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 | PAUL "CHIP" KNAPPENBERGER New Hope Environmental Services |
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| GEORGE KUKLA Lamont-Doherty Earth Observatory |
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 | HANS LABOHM Independent economist, former diplomat (Netherlands) |
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 | JAY H. LEHR, PH.D. Science Director The Heartland Institute |
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| BRYAN LEYLAND International Climate Science Coalition |
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| BEN LIEBERMAN The Heritage Foundation |
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| RICHARD LINDZEN, PH.D. Massachusetts Institute of Technology |
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| CRAIG LOEHLE, PH.D. Principal Scientist National Council for Air and Stream Improvement |
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 | GERALD MARSH University of Chicago |
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| STEVE McINTYRE Climate Audit |
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 | PATRICK MICHAELS, PH.D. Senior Fellow in Environmental Studies Cato Institute |
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 | ROBERT J. MICHAELS, PH.D. Professor of Economics California State University |
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| LORD CHRISTOPHER MONCKTON Science Advisor Science and Public Policy Institute |
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 | ALAN MORAN Institute of Public Affairs |
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 | NILS-AXEL MORNER, PH.D. Emeritus Professor of Paleogeophysics & Geodynamics Stockholm University, Sweden |
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 | GARTH PALTRIDGE, PH.D. Institute of Antarctic and Southern Ocean Studies (retired) |
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 | TIM PATTERSON, PH.D. Carleton University (Canada) |
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 | IAM PLIMER University of Adelaide |
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| ANDREAS PROKOPH University of Ottawa (Canada) |
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 | ARTHUR ROBINSON, PH.D. President Oregon Institute of Science and Medicine |
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 | HELEN ROE Queens University of Belfast |
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 | TOM SEGALSTAD, PH.D. University of Oslo |
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| GARY SHARP, PH.D. Center for Climate/Oceans Resources Study |
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| S. FRED SINGER, PH.D. Science and Envrionmental Policy Project |
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 | WILLIE SOON PH.D. |
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| ROY SPENCER University of Alabama-Huntsville |
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 | GRAEME T. SWINDLES, PH.D. University of Bradford |
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 | JAMES M. TAYLOR, J.D. Managing Editor, Environment & Climate News Senior Fellow, The Heartland Institute |
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| DAVID TUERCK Beacon Hill Institute Suffolk University |
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 | ANTHONY WATTS Chief Meteorologist, KPAY-AM Radio Host: www.surfacestations.org Author: "Is the U.S. Surface Temperature Record Reliable?" |
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 | MIKLOS ZAGONI Eotvos Lorand University |