Reuters: Developing nations have stepped up pledges to curb growth in greenhouse gas emissions as U.N.-led talks trying to seal a broader pact on fighting climate change intensity ahead of a major climate meeting in December. Following are comments from leading climate officials and policy analysts on how these steps will affect the tone of the talks and the outcome. (For related analysis, click on: [ID:nSP54859]; for related factbox [ID:nSP415940]) KIM CARSTENSEN, HEAD OF WWF’S …