Independent (UK): Who’s going? It is not for nothing that the pithily-entitled 15th Conference of the Parties to the United Nations Framework Convention on Climate Change, or COP15 for short, has been described as "the most difficult talks ever embarked upon by humanity". Some 17,000 delegates, campaigners and journalists will all be attempting to make their voices heard. A total of 98 leaders and heads of state will be in Copenhagen at some point during the two-week summit with most, including …