CANCUN, Mexico - United Nations Secretary-General Ban Ki-moon on Wednesday urged a positive outcome as the two-week Cancun summit nears its end.

"We must come out with an agreement in Cancun Even though that may not be sufficient, we must have certain development," Ban said in a meeting with China's top climate negotiator Xie Zhenhua.

Delegations from more than 190 countries should strive to hammer out a balanced progress for issues, including a fast-start fund, technology transfers and adaptation along a two-track negotiation process, Xie said.