We must not give in to pessimism, says Nick Stern.
Close to 100% CCS appears feasible, if expensive, as demonstrated in France and Germany. But it requires the right kind of politics, which is still lacking in the UK.
Attitudes of many people in the U.S. may be moving in the opposite direction from those of the administration , but there's a chance of limited progress in China.
P.S. 24 April: more from Stern et al.