As a new round of UN climate change talks began in Barcelona, climate activists gathered in the Spanish city to ring 1,000 alarm clocks in front of the conference venue to remind delegates time is "running out" for a deal.

Two hundred activists stood outside the conference venue holding their clocks high and shouting: "Tick tick tick, we need common action quick!"

Organizers of the TickTickTick campaign say they want to personally deliver one of the alarm clocks to Yvo de Boer, executive secretary of United Nations Framework Convention on Climate Change.

Campaign Organizer Ben Margolis said, "We want to tell them time is running out. We need the deal to be made in Copenhagen."

The activists turned the time on some clocks to 3:50, because 350 parts per million is the safe upper limit for carbon dioxide in the atmosphere according to some scientists.

About 4,000 negotiators and observers are gathering in Barcelona for the last round of UN climate talks before December's Copenhagen conference.

(CCTV November 3, 2009)