The discussions are shaping up for Copenhagen, as more countries like the US now are floating actual proposals for cutting their emissions, while other countries like China seem to want to refuse to do anything until those that got us to this point commit to paying their fair share. The arguments seem to be shaping up along these lines: Developing countries want the developed countries to “pay” for the reductions required in CO2 by drastically reducing their emissions from a baseline, as they have been the ones that have benefited from the failure to control emissions in the past. The developed countries are more worried about the rates of increase in CO2 emissions from the developing countries, partly because if the developed nations were to agree to reduce their emissions greatly, those emissions reductions would simply be “eaten up” in a few years by growing emissions from the developed world. The answer to getting any sort of binding agreements in Copenhagen (or later) seems to be in finding the metric to balance out both the developed world and the developing world in doing both.

If we are going to get to where we think we need to go, we need to do something along the lines of limiting average temperature rise to 2C, which translates into something like limiting CO2 concentration in the atmosphere to about 350 parts per million by volume (ppmv). To achieve this balance is going to mean a cap of emissions worldwide, which will be reduced over time to get where we need to go. It is not as simple as just dividing up the contributions to this cap by what contributions are now, which means developed economies get more since they started making the emissions first. We also can’t just divvy up the contributions to the emissions cap on a per capita basis, since that would mean that developed nations would have to reduce their emissions (and lifestyles) to those equivalent to the developing countries. But a balance can be struck, and possibly in ways that may not drive us all into economic ruin.

The US, most of Europe, Japan, Australia and other developed countries should be willing to make very challenging cuts to their 1990 base emissions, and in exchange India, China and the rest of the developing world should be willing to accept limits in their rates of emissions increases, or a limit in their per capita emissions which is lower than that in the developed world. Negotiations should focus on the definitions of developed/developing, and the size of cuts and per capita limits required worldwide to reach the goal. Negotiations can start with the voluntary unilateral cuts and commitments to go farther if others do their bit, as Australia has proposed to do. This is why I have advocated having our CPRS completed before the Copenhagen meeting.

If an international agreement is reached, we can then get on with achieving it, and despite the costs, it won’t have to ruin economies worldwide. I will post in the near future on why I don’t believe the costs will be significant in the overall scheme of things, even if the miniscule chance of the overwhelming scientific opionion proves to be incorrect!