Christian Science Monitor: In a tumultuous, overtime finale that capped two weeks of intense talks, ministers from more than 180 countries headed home this weekend with a framework for negotiating a new global-warming agreement by 2009. In the process, the talks appear to have sealed a major shift in the geopolitics of climate change. In part, this change has come about because the US is now more intensely involved in talks than at any other time during the Bush administration, says Artur …