U.N. climate negotiators gathered in Geneva were urged Sunday to show urgency and compromise in crafting a draft by next week for a global pact to be signed in December.

"I ask you to work with efficiency and a sense of compromise," Manuel Pulgar-Vidal, Peru's environment minister and president of the negotiations told the opening session of a six-day huddle.

A new round of peace talks between Libya's warring factions resumed in Geneva Monday to try and save the country from sinking into deeper chaos.

During a first round of U.N.-mediated discussions in the Swiss city earlier this month, warring factions from the strife-torn country agreed on a roadmap to form a unity government. 

Negotiators from Iran and six world powers met Thursday to broker a deal that could see Tehran freeze its disputed nuclear program in exchange for some relief from sanctions.

Officials have said that a long-awaited agreement on curbing Iran's nuclear ambitions may be finally within reach, after years of fruitless talks were given fresh momentum by the election of Iran's new President Hassan Rouhani, seen as a relative moderate.

U.S. officials were working hard behind the scenes Wednesday to try to persuade the Syrian opposition to agree to join peace talks mooted for next month.

U.S. ambassador to Syria Robert Ford, who has built up a close relationship with the opposition leaders over the past years, huddled with key figures in Istanbul seeking to coax them to the negotiating table.

Turkey on Sunday welcomed a U.S.-Russian deal aimed at disarming Syria of its chemical weapons but warned that Damascus could be seeking to buy more time for its deadly military campaign.

"As a matter of principle, Turkey welcomes the disposal of weapons of mass destruction anywhere in the world, and particularly of chemical weapons in our region," a government statement said.