Reuters: A gulf needs to be bridged if the world is to sign a new climate treaty by a December deadline, according to proposals from more than 30 countries posted on a U.N. website on Tuesday. The first suggested texts for a new pact underlined a rich-poor split on sharing the cost of fighting climate change, which has hampered ongoing U.N.-led climate talks meant to agree a deal in Copenhagen at the end of the year. Rich countries agree they have to lead a climate fight after enjoying …