Cheering and fearing at COP21

The biggest emitters of greenhouse gases, China and the United States, are finally on board

By Gwynne Dyer

The climate deal that almost 200 countries agreed to in Paris on Saturday was far better than most insiders dared to hope even one month ago.

The biggest emitters of greenhouse gases, China and the United States, are finally on board. There is real money on the table to help poor countries cut their emissions and cope with warming. They have even adopted a target of holding the warming to only +1.5 degrees C, instead of the limit of +2 degrees that was the goal when the conference opened.

Given all that, it’s a pity that the deal won’t actually stop the warming.

The plus-two limit was always too high. Beyond that, governments told us, we would have “dangerous warming”. Nonsense. We are having dangerous warming now – bigger storms, worse floods, longer droughts – and we are only at +1.0 C.

At plus-two or thereabouts, what we get is catastrophe: runaway warming that can no longer be halted just by stopping human emissions of carbon dioxide. Nature will take over, and we will be trapped on a one-way escalator that is taking us up to +3, +4, +5, even +6 degrees. Hundreds of millions or even billions of people would die as large parts of the planet ceased to be habitable by human beings.

If you don’t want to risk unleashing that, then you don’t want to go anywhere near +2, so the official adoption by the world’s governments of +1.5 degrees as the never-exceed limit is a major step forward. But note that they have only pledged “to pursue efforts to limit the temperature increase to 1.5C.” The hard-and-fast promise is still not to go past +2 – and there is not even any guarantee that that will be achieved.

In order to avoid a debacle like the one at the last climate summit in Copenhagen six years ago, nobody even tried to put enforceable limits on national carbon dioxide emissions this time. Each country was just invited to submit the emission cuts that it is willing to make.

The sum of all those promised cuts (if the promises are kept) is what we will get by way of global emission cuts in the next five years.

United Nations experts did the math, and concluded that these emission cuts fall far short of what is needed. If this is all that is done, then we are headed for at least +2.7 degrees C – or rather, for a lot more, because of the feedbacks. So are we doomed to runaway warming? Not necessarily.

The cuts that are politically impossible now may become quite possible in five or 10 years if the cost of renewable energy goes on dropping, if techniques like carbon capture and sequestration (CCS) become economically viable – and if people are sufficiently frightened by a climate that is getting wilder and less predictable by the year.

So there is a review process built into the treaty. Every five years, starting in 2018, there will be a “stock-taking” exercise in which everybody’s progress in cutting their emissions will be reviewed, and everybody will be encouraged to increase their commitments.

We are not out of the woods yet, but we are probably heading in the right direction – and it would be right at this point to put in a good word for the United Nations. It is the only arena in which global negotiations like this can be conducted, and its skills, traditions and people were indispensable in leading them to a more or less successful conclusion.

– Gwynne Dyer is an independent journalist whose articles are published in 45 countries.

 

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