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Comment (The last United Nations negotiating session before next month's Copenhagen summit on climate change has ended in Spain, with rich and poor nations still deeply divided.
Officials say a new treaty to replace the Kyoto accords on greenhouse gas emissions could take another year.
UN officials have admitted progress has been so slow on the most difficult issues they will need more time to legally seal the deal.
The key problems are targets for emissions cuts and money for poorer nations.
Copenhagen could still lead to a significant political agreement, but if it happens it will be a major achievement.
Above targets, money and technology, one major element was clearly missing this week - trust.
As the session winds up, finance ministers from the G20 have arrived in Scotland to discuss the global financial recovery and tackle climate change.
G20 meeting
G20 countries are agreed on the need to cut carbon emissions, but not on ...
