1. Cambridge Centre for Climate Change Mitigation Research, Department of Land Economy, University of Cambridge, Cambridge CB3 9EP, U.K.
2. School of Earth and Environment, University of Leeds, Leeds LS2 9JT, U.K.
3. St. Edmund’s College, University of Cambridge, Cambridge CB3 0BN, U.K.
4. Center for International Climate and Environmental Research − Oslo (CICERO), N-0318 Oslo, Norway