Agence France-Presse: World leaders could fail to reach a new climate deal at a UN summit in Copenhagen if rich countries refuse to financially help developing nations tackle climate change, government and NGO officials said at a development conference that wrapped up Saturday. With less than 50 days to go before it starts, the Copenhagen summit was a central topic of debate and discussion at the annual EU development conference, held in Stockholm. “We don’t think they’ll be a deal without the right …