**US President Barack Obama will go to the key UN climate summit in the Danish capital Copenhagen in December, a US administration official has said.**Mr Obama will attend the start of the summit before going to Oslo to pick up his Nobel Peace Prize, but will not return for the end, the official added.
The talks will attempt to draw up a new global climate treaty to supplant the 1997 Kyoto Protocol.
So far more than 60 world leaders have said they will attend the summit.
Observers say the attendance of such figures as Mr Obama will raise expectations, although the talks are not expected to result in a new treaty.