The U.S. and China are set to engage in talks about climate pledges in Copenhagen. Both nations are currently the world’s highest emitters of greenhouse gases and have the potential to spur on other nations to follow suit in mitigating global warming. Thus far, the two nations have not made significant strides in working toward that effort. Recent talks have amounted to a lot of bluffing, posturing and feet-dragging, with China taking a slightly greater lead in taking on responsibility for the environment. Alex Pasternack at TreeHugger has a report on the current talks among policy experts and politicians. The central question that needs to be addressed is how and to what extent can developing and developed nations be held accountable?