(3 October 2012)  ‘On the two degrees policy target’.  I have written this short essay (read here: see pp.122-125), explaining why ‘two degrees’ is unhelpful as a policy target, as a contribution to the newly published book edited by Ottmar Edenhofer and colleagues — Climate change, justice and sustainability: linking climate and development policy  Springer, Dordrecht, Germany, 380pp.