U.N. Secretary-General Ban Ki-moon said in an interview published on Sunday that he was optimistic the Dec. 7-18 climate conference in the Danish capital would produce an agreement all member states would sign. Delegates from 190 nations have descended on Copenhagen over the weekend for the U.N. climate change conference that starts on Monday and aims for a new global deal to replace provisions of the Kyoto Protocol expiring in 2012. "I am very optimistic for Copenhagen," Ban said in an interview in the Danish daily newspaper Berlingske Tidende, according to a report of Reuters. "We will get an agreement -- and, I believe, that the agreement will be signed by all U.N. member states which is historic," Ban said in the interview at his office at U.N. headquarters in New York. "We have the right political spirit," Ban said. "All heads of state and government have the same goal -- to prevent global warming."