Abraham, John: Professor of Thermal and Fluid Sciences, University of St Thomas School of Engineering
Acton, Edward: Professor and UEA Vice-Chancellor
Akasofu, Professor Syun-Ichi: Director, International Arctic Research Centre
Allan, Professor Richard: Professor of Climate Science, University of Reading
Allen, Christine: Director of Policy, Christian Aid
Allen, Professor Myles: Physicist and head of the Climate Dynamics group at the University of Oxford
Allwood, Dr. Julian: Cambridge Director, Low Carbon Energy University Alliance
Anderson, Professor Kevin: Chair of Energy and Climate Change, Tyndall Centre
Andrews, Bob: Spokesman for Eastside Climate Action (UK group)
Anglin, Charles: Director of Communications, RenewableUK
Annan, Dr James: Climate scientist at the Frontier Research Centre for Global Change
Arnell, Professor Nigel: Director, Walker Institute for Climate System Research, University of Reading
Ashley, Professor Michael: Astrophysicist, University of New South Wales
Ashton, John: Special Representative for Climate Change, FCO UK, 2006-2012
Attenborough, Sir David: British broadcaster and naturalist
Ball, Professor Tim: Retired professor of Geography, University of Winnipeg
Ban, Ki-moon: Secretary-General of the UN
Barker, Dr. Terry: Chairman of Cambridge Econometrics
Barrett, Paul: Assistant managing editor and senior writer at Bloomberg Businessweek
Basel, Britt: Climate Change Adaptation and Sustainable Resource Management Consultant
Barroso, José Manuel: 11th and current President of the European Commission
Barwell, Paul: Chief Executive, Solar Trade Association
Bast, Joseph L: President, The Heartland Institute
Beard, Simon: Research Associate, Centre for the Study of Existential Risk
Beddington, Sir John: UK Government Chief Scientist, 2008-2013
Bell, John: Church of Scotland minister, member of Iona Community
Bellamy, David: Environmental campaigner and botanist
Bell Burnell, Dame Jocelyn: Astrophysicist and Fellow of the Royal Society
Benn, Hilary: Shadow Secretary of State (UK) for Communities and Local Government
Bennett, Natalie: Former leader, UK Green Party
Berry,Siân: Co-leader, Green Party of England and Wales
Betts, Dr. Richard: Head of Climate Impacts area at UK Met Office
Bindschadler, Dr Bob: Senior research Earth scientist at NASA
Black, Richard: Former BBC environment correspondent
Blair, Tony: Prime Minister of the UK, 1997 - 2007
Bleriot, Jocelyn: Head of Editorial, Ellen MacArthur Foundation
Boardman-Pattinson, Robin: Extinction Rebellion activist
Bosworth, Tony: Climate change campaigner, Friends of the Earth
Bows, Dr. Alice: Senior lecturer in Energy and Climate Change at the Sustainable Consumption Institute
Bradbrook, Dr. Gail: Co-founder of Extinction Rebellion
Branson, Sir Richard: Founder, Virgin Group
Broome, Professor John: Professor of Moral Philosophy and IPCC Lead Author
Brown, Edmund "Jerry" G. Jnr: Governor of California
Brown, Gordon: British Labour Party politician, Prime Minister 2007-2010
Brown, Kathryn: Head of Adaptation, Committee on Climate Change (UK)
Brown, Dr Noel: Former Director of UNEP, Regional Office for North America
Buerk, Michael: BBC journalist and newsreader
Buffett, Warren: Business magnate, investor and philanthropist
Burke, Tom: Former Executive Director, Friends of the Earth
Burgess, Richard: UK News Editor, BBC News
Calder, Nigel: Science writer and former editor of New Scientist
Campbell, Dr. Philip: Editor-in-Chief, Nature
Cardoso, Dr. Catarina: Business Sustainability Executive
Carrington, Damian: Head of environment at the Guardian
Carter, Professor Bob: Palaeontologist, stratigrapher and marine geologist
Chavez, Hugo: President of Venezuela from 1999 until his death in 2013
Chivers, Helen: Meteorologist, Met Office
Christy, Dr. John: Professor of Atmospheric Science, University of Alabama in Huntsville
Cicerone, Professor Ralph: President of the National Academy of Sciences
Coleman, John: Chief meteorologist, KUSI-TV
Constable, Dr John: Director of Policy and Research, Renewable Energy Foundation
Cook, John: Australian blogger and author
Corbyn, Jeremy: Leader, UK Labour Party
Corbyn, Piers: Astrophysicist and weather forecaster
Corner, Dr Adam: Research Associate in the Understanding Risk research group at Cardiff University
Cox, Professor Brian: Particle physicist and professor at the University of Manchester
Craven, Greg: Teacher, Central High School, Independence, Oregon
Crompton, Tom: Change Strategist, WWF
Crotty, Tom: CEO, Ineos Olefins & Polymers Europe
Cullen, Heidi: Chief scientist, Climate Central
Curry, Dr Judith: Climatologist, Georgia Tech
Darwall, Rupert: Author of The Age of Global Warming: A History
Davey, Sir Ed: Secretary of State for Energy and Climate Change in the UK, 2012-2015
Davies, Professor Trevor: Pro-Vice Chancellor for Research, University of East Anglia
Deben, Lord: John Gummer, Chairman of the Committee on Climate Change (UK)
de Boer, Yvo: Former Executive Secretary of the UNFCCC
de Rivaz, Vincent: CEO of EDF Energy (UK) Limited
Delingpole, James: Sceptical writer and journalist
Dietz, Professor William: Director of the STOP Obesity Alliance, George Washington University
Dorling, Professor Danny: Professor of Geography, Sheffield University
Dunion, Jason: Meteorologist, University of Miami and NOAA
Durkin, Martin: Television producer and director
Ebell, Myron: Director of Global Warming and International Environmental Policy, CEI
Edwards, Dr. Tamsin: Climate scientist and blogger
Ehrlich, Dr. Paul R: Ecologist, biologist and Bing Professor of Population Studies at Stanford University
Ekwurzel, Dr Brenda: Climate scientist at the Union of Concerned Scientists
Emanuel, Professor Kerry: Meteorologist, Massachusetts Institute of Technology
Emmott, Professor Stephen: Head of Computational Science, Microsoft
Farage, Nigel: MEP for South East England, leader of Brexit Party, former leader of UKIP
Feilden, Tom: BBC Today Programme science correspondent
Fells, Professor Ian: Emeritus Professor of Energy Conversion, University of Newcastle upon Tyne
Field, Professor Chris: Co-chair, IPCC Working Group II
Figueres, Christiana: Executive Secretary, UNFCCC
Flint, Caroline: UK Labour Party MP, Shadow Energy Secretary
Forster, Professor Piers: Professor of Physical Climate Change
Fox, Josh: Activist and film director
Francis, Pope: Pope of the Catholic Church
Fraser, Giles: Anglican priest, journalist and broadcaster
Fretwell, Peter: Geographer, British Antarctic Survey
Friedman, Thomas: Columnist, New York Times
Gergis, Dr Joëlle: Climate research fellow, University of Melbourne
Giddens, Anthony: Sociologist
Gilding, Paul: Former CEO of Greenpeace International
Gleason, Jeffrey: Wildlife biologist
Gleick, Dr. Peter: Hydroclimatologist, co-founder of the Pacific Institute, Oakland CA
Glover, Professor Anne: Chief Scientific Adviser to the President of the European Commission, 2012-2014
Gomwe, Godfrey: CEO, Anglo American Thermal Coal
Goodess, Dr. Clare: Senior Researcher, Climatic Research Unit, UEA
Gore, Al: 45th Vice President of the United States, author of An Inconvenient Truth
Gove, Michael: UK Secretary of State for Environment, Food and Rural Affairs
Grayling, Tony: Head of Climate Change and Communities, Environment Agency
Gross, Dr. Robert: Director, Centre for Energy Policy and Technology, Imperial College London
Hadow, Pen: Explorer
Haigh, Joanna: Professor of Atmospheric Physics, Imperial College London
Hall, Tony: Anthony William "Tony" Hall, Baron Hall of Birkenhead, Director-General of the BBC
Hallam, Roger: Co-founder of Extinction Rebellion
Hansen, Dr. James: Head of the NASA Goddard Institute for Space Studies, 1981-2013
Happer, Dr. William: Professor of Physics, Princeton University
Harrabin, Roger: BBC's Environment Analyst
Harvey, Emily: Community facilitator, Going Carbon Neutral Stirling (GCNS)
Hawkins, Professor Ed: Professor of Climate Science, University of Reading
Hayes, John: Energy Minister, H.M. Government, UK, 2012-2013
Hayhoe, Professor Katharine: Climate scientist, Texas Tech University
Hedegaard, Connie: European Commissioner for Climate Action
Helm, Professor Dieter: Professor of Energy Policy at Oxford University
Helmer, Roger: MEP and UKIP energy spokesman
Hempleman-Adams, David: British adventurer
Hill, Julie: Chair of the Circular Economy Taskforce, Green Alliance
Hoggett, Professor Paul: Professor of Social Policy, University of the West of England
Holden, Sue: CEO, The Woodland Trust
Holdren, John: Director, White House Office of Science and Technology Policy
Holliday, Steve: Chief Executive of the UK National Grid, 2007-2016
Hope, Dr. Chris: Reader in Policy Modelling, Judge Business School
Horton, Dr. Richard: Editor in Chief, the Lancet
Hoskins, Sir Brian: Head of the Grantham Institute for Climate Change
Houghton, Sir John: Former co-chair of the IPCC's scientific assessment working group
Howard, John: Former Prime Minister of Australia
Hudson, Paul: BBC weather presenter and climate change correspondent
Huhne, Chris: Secretary of State for Energy and Climate Change in the UK, 2010-2012
Hulme, Professor Mike: Professor of Climate and Culture, Kings College London
Hunt, Sir Tim: Nobel Laureate in Physiology or Medicine 2001
Huq, Saleemul: Senior fellow, IIED
Hutchins, Liz: Senior campaigner, Friends of the Earth
Ion, Professor Sue: Non-Executive Board Member at the UK government's Health and Safety Laboratory
Jarvis, Dr. Andrew: Climate modeller, Lancaster University, UK
Jarraud, Michel: Secretary General of the World Meteorological Organisation
Jenkins, Jolyon: BBC Producer
Jones, Professor Jonathan: Sainsbury Laboratory, Norwich
Jones,Phil: Director of CRU, University of East Anglia
Jones, Professor Steve: Geneticist and science writer
Jungbauer, Senator Michael: Republican Member of the Minnesota Senate, United States
Juniper, Tony: Environmental campaigner
Kahan, Dr. Dan: Professor of Law, Professor of Psychology, Yale Law School
Karl, Professor Tom: Director, NOAA National Climatic Data Center
Kealey, Dr Terence: Vice-Chancellor of the University of Buckingham
Keeling, Professor Ralph: Climate scientist at Scripps Institution of Oceanography
Keenan, Douglas: Mathematician and former financial trader
Kelly, Professor Michael: Physicist and GWPF board member
Kerry, John: U.S. Secretary of State
Kim, Dr. Jim Yong: 12th President of the World Bank
King, Dr. Brian: Physical oceanographer
King, Sir David: Former Chief Scientific Adviser to H.M. Government, UK
Klein, Naomi: Social activist and author of This Changes Everything
Krebs, Lord: John Krebs, zoologist, Chair of the CCC Adaptation Subcommittee
Kronick, Charlie: Chief policy advisor, Greenpeace
Laden, Greg: Biological anthropologist and blogger
Laframboise, Donna: Investigative journalist and author
Lamb, Professor Hubert: Climatologist and first Director of CRU
Lawson, Nigel: Baron Lawson of Blaby, Chairman of the Board, GWPF
Laxon, Professor Seymour: Professor of Climate Physics, UCL
Laybourn-Langton, Laurie: Senior research fellow, IPPR
Leape, Jim: Director General, WWF
Leggett, Jeremy: Founding Director of Solarcentury, Director and Chair of SolarAid
Leiserowitz, Anthony: Director, Yale Project on Climate Change Communication
le Quere, Professor Corrinne: Director, Tyndall Centre
Lewandowsky, Professor Stephan: Cognitive psychologist
Lewis, Nic: Independent scientist and mathematician
Lickorish, Derek: Head of UK Government's Fuel Poverty Advisory Group
Lilley, Peter: Conservative MP, UK Parliament
Lindzen, Professor Richard: Atmospheric physicist and Professor of Meteorology at MIT
Lockwood, Professor Mike: Physicist, University of Reading
Lomborg, Bjorn: Author, academic and environmental writer
Lovelock, James: Independent scientist, environmentalist and futurologist
Lucas, Caroline: Green Party (UK) MP for Brighton Pavilion
Lynas, Mark: Author and environmental activist
Mace, Professor Georgina: Professor of Conservation Science, Imperial College, London
Mann, Professor Michael: Climatologist, director of the Earth System Science Center, Pennsylvania State University
Marshall, George: Co-founder, Climate Outreach and Information Network (COIN)
Maslin, Professor Mark: Director of the UCL Environment Institute and Head of the Department of Geography
Maslowski, Dr Wieslaw: Professor of Oceanography
May, Robert: Baron May of Oxford, theoretical ecologist
May, Theresa: UK Prime Minister
McDonnell, John: UK MP for Hayes and Harlington, Shadow Chancellor
McIntyre, Steve: Canadian mathematician, founder and editor of Climate Audit
McKitrick, Ross: Professor, Department of Economics, University of Guelph
Merkel, Angela: Chancellor of Germany
Meyer, Cornelia: Chief Executive, Meyer Resources
Miliband, Ed: Secretary of State for Energy and Climate Change in the UK from 3 October 2008 to 11 May 2010
Monbiot, George: Environmental and political writer and activist
Monckton, Lord Christopher: 3rd Viscount Monckton of Brenchley
Monnett, Dr. Charles: Wildlife biologist
Montford, Andrew: Blogger (Bishop Hill) and author,The Hockey Stick Illusion
Mooney, Chris: American journalist, author of The Republican Brain
Moore, Charles: Journalist, former editor of The Daily Telegraph
Morales, Evo: President of Bolivia
Morano, Marc: Founder and editor of Climate Depot
Moss, Stephen: Naturalist, writer and broadcaster, based at the BBC Natural History Unit
Muller, Professor Richard: Lead scientist, Berkeley Earth Surface Temperature Project
Myers, Norman: British environmentalist specialising in biodiversity
Myhre, Dr. Sarah: Founder and Executive Director, Rowan Institute