Guardian: China rebuffed efforts to prod it towards major climate concessions today, but nudged closer to meeting US demands that it open its carbon accounts to the world. As talks moved into the final day, China pledged more flexibility on the vexed issue of how its pledges to curb pollution will be internationally verified. The world’s biggest carbon emitter also confirmed it wants to set a 2C rise as the maximum temperature target. But it accused developed nations of failing to set …