Mayer Hillman is Senior Fellow Emeritus at the Policy Studies Institute in London. He is one of the first proponents of personal carbon rationing as the way for the world's population to prevent serious damage from climate change.
Tina Fawcett is a senior researcher at the Environmental Change Institute, University of Oxford.
Sudhir Chella Rajan is a professor of humanities and social sciences at the Indian Institute of Technology Madras and a Senior Associate at the Tellus Institute in Boston.