The focus on China intensified late last year, when new data from the International Energy Agency and other research organizations revealed that China had overtaken the US as the largest source of greenhouse gases – and, more ominously, that its emissions are growing at a rate that exceeds all wealthy nations’ capacity to decrease theirs. Even if China met its own targets for energy conservation, its emissions would increase by about 2.3 billion metric tons over the next five years – far larger than the 1.7 billion tons in cutbacks imposed by the Kyoto Protocol on the 37 developed “Annex 1” countries, including the US.