Agence France-Presse: Obama said in a surprise video message to an international conference on climate change hosted by five US state governors here that he would show new leadership on the issue as soon as he takes office in January. The president-elect also addressed his message directly to delegates at United Nations climate change talks in Poland next month. “While I won’t be president at the time of your meeting and while the United States has only one president at a time, I’ve asked members of …