Climate Cup half-full or half-empty?

Following the comments on the New York climate summit in the media is like surfing. Up you go on a wave of optimism, then down into the depths of almost-despair. “Barack Obama warns world of climate catastrophe”, “Obama disappoints environmentalists”, “China’s carbon pledge boosts hope of global climate deal”. My colleague Christina Bergmann, one of our US correspondents, opts for “The Chances for Copenhagen have risen again”. Her optimistic headline reflects Ban Ki Moon’s satisfaction about climate change being right up at the top of the agenda of the world’s leaders. Japan and China also give grounds for optimism, Japan with a clear pledge to reduce emissions by 25 percent by 2020, China with a message of strong intent, but no firm targets.
President Obama is clearly in a difficult position, trying to get backing at home for what would represent a dramatic change in policy. Still, given signs by the top emitters China and the USA, Japan and key emerging nation India that the importance of an effective Copenhagen deal is paramount, we have to be optimistic. As one of the Green candidates in Germany’s election (coming up this Sunday) said to me at an event last week, “we have no option”. The alternative is too awful to contemplate.