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Copenhagen Climate Talks Set to Begin: What's Likely to Happen and What's at Stake

Here are a few of the places that bear watching, to see if some kind of consensus develops over the course of the proceedings:

• What's the science really saying? For almost five years, the consensus position of those who cared about producing a treaty has been that we're struggling to avoid a temperature rise greater than two degrees, and that to do that we'll need to limit atmospheric concentrations of carbon dioxide to less than 450 parts per million. These sound like the kind of eye-glazing numbers that journalists try to avoid -- but the vast and slow-moving bureaucracy of the climate negotiations process has adopted them as the goal, and most of the proposals on the table are geared to reaching (or plausibly approaching) those targets.
  
  The problem is, that's not good science any more. After the rapid melt of Arctic sea ice in the summer of 2007, researchers recalibrated. A NASA team said that the right figure is 350 -- that anything more is not compatible with "the planet on which civilization developed and to which life on earth is adapted." That assertion has been backed up by no less than Rajendra Pachauri, the UN's chief scientist, who has gotten grief for saying -- most recently in an interview with Yale Environment 360 -- that 350 is where we need to go. Ninety-two of the poorest nations on Earth have officially signed on to that target, and at the moment it's still in the negotiating text, albeit in a preamble about a "shared vision" for the future.
  
  The problem, of course, is that meeting a 350 target goes far beyond anything the Obama administration, much less the Senate, or the Chinese, or many of the other big players, are currently contemplating. We now know that Obama will arrive on Dec. 9 en route to Oslo, and that he will offer roughly a 17 percent cut in 2005 emissions levels by 2020. That would be about a zero percent cut from 1990 levels; in other words, not very ambitious -- the absolute minimum for saving face, but not enough to save the world.
  
  Going further would be fundamentally disruptive -- it would mean not incremental change but a wartime footing. So the question of which science you embrace is really a proxy for how much you're willing to do. And in this case "political realists" are the opposite of "scientific realists." If you're figuring the odds, there will more politicians than scientists on hand in Copenhagen.


• How tough will the developing countries be? Since Obama's announcement that he will go to Copenhagen robbed journalists of their first cliffhanger, the next is likely to be whether the most vulnerable nations walk out on the proceedings. Here's Mohammed Nasheed, president of the Maldives, whose country sets aside money in its budget each year in case it needs to buy a new homeland when its current one sinks beneath the waves, talking about what a 2 degree Celsius temperature increase would mean: "At two degrees we would lose the coral reefs. At 2 degrees we would melt Greenland. At 2 degrees my country would not survive." He called the proposals from the big players a "suicide pact" and pledged to try and stop them. "As a president I cannot accept this. As a person I cannot accept this. I refuse to believe that it is too late, and that we cannot do anything about it."
  
  Nasheed rallied a dozen of the most vulnerable nations earlier this month at a summit in his capital of Male. And virtually every poor nation is starting to realize how badly they're going to be hit by climate change: The vulnerability of Andean glaciers, Asian monsoons, African rainfall patterns become clearer with each passing year. But the pressure from the rich nations -- and indeed from some of the big environmental groups -- not to be a skunk at the garden party will be intense. And it will come with sums of money attached — the kind of money that traditionally has been enough to buy off the anger of the poor world.


• Which leads to the next obvious question -- just how much money will be on the table? The sums required are staggering. The World Bank recently estimated that keeping temperature rise to 2 degrees Celsius would mean spending $140 to $675 billion a year in the developing countries -- which, after all, will only be developing if they keep figuring out how to acquire more energy. And adaptation -- dealing with the effects of the climate change we can't prevent — would run another $75 billion a year (an estimate that other research paints as extremely optimistic).
  
  Sums like that are not on offer. The Europeans have talked about a deal in the range of $100 billion a year, but that depends on the Americans ponying up, and so far the U.S. has been as coy about its willingness to pay as about its willingness to rein in emissions. Everyone outside the U.S. knows that this is -- overwhelmingly -- a problem we've caused; since the carbon molecule has a residence time of over a century in the atmosphere, it will be the decades before the Chinese, despite their vastly larger numbers, are as responsible for climate change as Americans. But if Obama puts a realistic number on the table, Senator James Inhofe (R-Armageddon) will be on hand to take it off. (Inhofe originally announced he was going to Denmark as a "one-man truth squad," but then added John Barasso (R-WY) and "a secret person" to his delegation). In our poisonous politics, the idea of the U.S. meeting anything like its moral obligation seems small -- and without that, the politics gets harder for everyone else in the world.

Against this backdrop, there's a lot of important and less flashy stuff that has to move forward if we're ever going to reach an agreement. Nations with large swaths of forest, for instance, seem willing to make a deal to stop their destruction. It's cheap compared with the other steps we'll need to take, so it will probably happen -- though the devil is deeply in the details. The same with credits for farmers for keeping carbon in the soil -- it could be a big help, or a loophole large enough to drive an endless fleet of combines through.

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