Warnings about climate change have been increasingly urgent, but there's no collective will to take action. Now the focus is shifting, from prevention to mitigation. Global warming is happening. If it's not going to be slowed down, how can it be coped with? We hear about the latest report from the UN's International Panel on Climate Change, due out on Sunday. It will advocate expensive, untested technologies. It's all about preparing for next year's Summit of world leaders in Paris. There's hope that it might make up for the failed summit in Copenhagen in 2009. Will another call for alarm make a difference? Is it time to re-frame the issue and talk about how to prepare for the consequences of not taking action?