Agence France-Presse: UN Secretary General Ban Ki-moon will attend a sustainable development conference starting on Thursday that organisers hope will help lay the groundwork for key talks on cutting carbon emissions later in the year. The focus at the three-day Delhi Sustainable Development Summit 2009 also will be on the United States, which is to lay out its new policy on climate change under President Barack Obama, according to organisers. John Kerry, chairman of the US Senate Foreign Relations …