—and therefore 25% of the world's carbon emissions were not covered the treaty.
The second problem is that Brazil, India, China, and the so-called G77 did not have any emission reduction obligations under the treaty. So Kyoto essentially never could work as a construct.
What we need at Copenhagen is an approach that brings in all the principal emitters and contains obligations for all of them. It needs to be an approach that the United States is prepared to ratify so that we can all get about the serious business of reducing emissions in an orderly way and, frankly, in a real way. That is something that Kyoto has never achieved.