E. J. “Ben” Anthony, School of Water, Energy and Environment, Building 40, Cranfield University, Cranfield, Bedfordshire MK43 0AL, UK. Email: b.j.anthony@cranfield.ac.uk

Ben Caldecott, Smith School of Enterprise and the Environment, University of Oxford, South Parks Road, Oxford, OX1 3QY, UK. Email: ben.caldecott@smithschool.ox.ac.uk

Rachel Cleetus, Union of Concerned Scientists, Two Brattle Sq., Cambridge, MA 02138-3780, USA. Email: RCleetus@ucsusa.org

Seth Collins, Saïd Business School, University of Oxford, Park End Street, Oxford, OX1 1HP, UK. Email: Seth.Collins.mba2016@said.oxford.edu

Barbara Gottlieb, Physicians for Social Responsibility, 1111 14th Street NW, Suite 700, Washington, DC 20005, USA. Email: bgottlieb@psr.org

Zeshan Hyder, Missouri University of Science and Technology, Mining and Nuclear Engineering Department, Rolla, MO 65409, USA. Email: zhfy6@mst.edu

Ken Kimmell, Union of Concerned Scientists, Two Brattle Sq., Cambridge, MA 02138-3780, USA. Email: KKimmell@ucsusa.org

Lucas Kruitwagen, Smith School of Enterprise and the Environment, University of Oxford, South Parks Road, Oxford, OX1 3QY, UK. Email: Lucas.kruitwagen@smithschool.ox.ac.uk

Alan Lockwood, University at Buffalo, Buffalo, NY, and Physicians for Social Responsibility. Email: ahl@buffalo.edu

Liam McHugh, World Coal Association, Regent Street, London, W1 4JD, UK. Email: LMchugh@worldcoal.org

Colin E. Snape, University of Nottingham, Faculty of Engineering, Energy Technologies Building, Triumph Road, Nottingham, NG7 2TU, UK. Email: colin.snape@nottingham.ac.uk