- John Harte: Energy and Resources Group, University of California, Berkeley, California 94720, USA. jharte@socrates.berkeley.edu
Thomas et al. have carried out a useful analysis of the extinction risk from climate warming. Their overall conclusion, that a large fraction of extant species could be driven to extinction by expected climate trends over the next 50 years, is compelling: it adds to the many other reasons why new energy policies are needed to reduce the pace of warming.