Economist: GOVERNMENTS like to cite external constraints--such as meeting the conditions for an international bail-out--when pushing through unpopular policies. But with measures to deal with climate change, the opposite prevails. Each round of intergovernmental talks on cutting emissions and compensating victims seems to achieve less than the one before. Meanwhile, according to a new study of 33 countries for GLOBE, a group of legislators from round the world, the number of new domestic environmental laws...