If you have doubts about the merits of carbon trading I suggest you read the following link selling hot air. Not only does it seem that greenhouse emissions trading is working to reduce emissions, but that the side benefit is increased energy prices in areas like Europe (which is further enabling further CO2 reductions), and a large transfer of associated money from the first world to the third world (albeit mainly China) on UN approved project of greenhouse emmission reduction. This brings me to the issue of reducing food miles. This always smacked to me of import restrictions by stealth, just like disease quarantine barriers to banana imports. I think that there should be as little restriction as possible on food imports, because these are critical to pull the third world out of poverty. Third world poverty is what will make them so much more susceptible to future natural disasters. Foreign aid is so paternalistic compared to opening of trade and migrant labour barriers.
Signing Kyoto seems also to be fairly meaningless, as it is being used as a reference line for Australia and the US which didn't sign it, and is being ignored if not flagrantly overrun by countries like Canada, which did.