BANGKOK, Oct. 3 (UPI) -- A high-ranking United Nations official says progress in the latest round of climate-change negotiations was mixed.

TOKYO, Feb. 16 (UPI) -- U.N. climate chief Yvo de Boer told Japanese leaders they need to set some aggressive targets for reducing carbon dioxide emissions.

POZNAN, Poland, Dec. 10 (UPI) -- The top U.N. climate official, Yvo de Boer, has given an upbeat prognosis for the final two days of a major climate conference in Poznan, Poland.

HONOLULU, Feb. 1 (UPI) -- A top U.N. climate official outlined in Hawaii steps to fight climate change.

UNITED NATIONS, Dec. 6 (UPI) -- Special negotiating teams named at the U.N. climate change conference in Bali will discuss plotting a road map for tackling different aspects of the issue.

UNITED NATIONS, Dec. 5 (UPI) -- Delay in considering adaptation for climate change could negatively affect the world's poor, a U.N. official told the climate change conference in Indonesia.

UNITED NATIONS, Dec. 4 (UPI) -- A work group that will determine elements of a plan to address climate issues has been created by delegates to the U.N. climate change conference in Bali.