Again, as I said, it really depends on how you're proposing to meet those goals. The Kyoto Protocol, for the first commitment period.... You may recall that after Kyoto we spent four years in negotiation to determine the rules that would be applied to meet that target. And again, it's an absolute amount. That included rules on land use and land-use change in forestry; it included rules related to the use of international project-based offsets; and it also included rules related to emissions trading, to the acquisition of surplus emission units from countries that had such a surplus.
On October 22nd, 2009. See this statement in context.