COPENHAGEN, Dec 16 (Reuters) - All nations need to set tougher targets to combat global warming at a U.N. summit and the rich should set a 2020 target for climate aid to the poor, U.N. Secretary General Ban Ki-moon said on Wednesday.
"We are just three days away from a final deal in Copenhagen. I am reasonably optimistic," Ban told Reuters Insider television on the sidelines of the Dec. 7-18 meeting, which is seeking to agree a new U.N. deal to combat global warming.
"I would urge all the countries to come out with more ambitious targets," he said.