the United States’s share of global emissions cuts needed by the end of the decade might be something like 30 percent (the largest of any single country). But not all of those reductions would need to be done at home—some could be met by financing and otherwise supporting the transition to low-carbon pathways in the South. And according to the researchers, with every nation’s share of the global burden clearly defined and quantified, there would be no need to rely on ineffective and easily gamed market mechanisms like carbon trading.50
