(Posted by John.)
Despite all the debate in places like Canada or Denmark, the reality is that the fate of global climate change will be decided by the actions of a few large countries - primarily the US and China, with India catching up fast. CO2 emissions in the US are, predictably, already huge. China and India (as well as other large developing countries) are growing quickly, but starting from a lower base. Nevertheless, China already makes up more than any other country save the US - though the EU collectively emits more. India is #5, behind Japan and Russia.
