Simon L. Lewis is Professor of Global Change Science at University College London and the University of Leeds. An award-winning scientist, he has been described as having 'one of the world's most influential scientific minds'. He has written for the Guardian and Foreign Policy magazine.

Mark A. Maslin is Professor of Climatology at University College London, a Royal Society Industrial Fellow, and a Royal Society Wolfson Research Merit Scholar. He is the author of eight books and has written for The Times and New Scientist.