World leaders are locked in talks as they attempt to deliver a last-minute deal at the Copenhagen climate summit. Confusion has dominated the final scheduled day as several draft texts were circulated on Friday afternoon. The US, EU and China have not offered anything new in public, prompting fears that a meaningful deal to curb global emissions was slipping beyond reach. US President Barack Obama held a second meeting with China's premier in an effort to break the deadlock. The talks are now expected to continue late into the night.

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