Agence France-Presse: The flood of world leaders heading for next week’s UN climate summit make an accord certain — but the new deal will not be enough to truly fight global warming, a top climate scientist said Saturday. Jean-Pascal van Ypersele, vice-chair of the Intergovernmental Panel on Climate Change (IPCC), said more top-level politicians would attend Copenhagen than previous talks in Kyoto, where the current climate treaty was agreed. "In Kyoto, there was Al Gore, US vice president, and two …