I can't get too excited about this Copenhagen "last chance to save the planet" bullshit. Not that I'm a climate change denier, just a skeptic. It seems plausible enough to me that if you chuck gigatonnes of a greenhouse gas into the atmosphere every year it'll have an effect; but if the questions of what effect and how much of one in what timeframe are being answered by some computer models someone thought up, I don't really want to bet my tax dollars that the answers are worth a damn.
"But!" I hear you cry. "The world's most disreputable politicians are gathering in Copenhagen right now to bet shitloads of our tax dollars on it!" Well, I'm not so sure they are. We're talking about politicians here, and we're talking about a voting public who may be wallowing in feel-good crap about 40% emission reductions right now, but won't have thought for a moment about what such a reduction would actually do to their lives. I question how game the world's politicians will be to force voters to put their money where their big, bullshitting mouths are.
My money's on a rerun of Kyoto: there'll be a lot of rash promises, backed up with little action. Key will "commit" to emissions cuts of whatever percent, in the certain knowledge that there isn't the slightest chance of meeting that commitment. Others will do the same, and nobody will really be in a position to poke the finger at anyone else. Eventually, either we'll be in the shit and our entire effort and ingenuity will be directed to finding solutions to a problem that actually, demonstrably exists - or we'll be laughing at how stupid people were back then in the early 2000s. Hard to say which at this point, but running round like Chicken Little isn't called for either way.