Bloomberg: United Nations Secretary-General Ban Ki-moon said setting specific targets for cutting greenhouse-gas emissions blamed for global warming may be “too ambitious” for delegates meeting this week in Indonesia. Ministers from more than 130 nations began meeting today on the resort island of Bali to set an agenda for talks to replace the Kyoto Protocol, which expires in 2012. Delegates must agree to a timeline for a new treaty on cutting greenhouse-gas emissions by 2009, or they will …