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Finance will be the key to any new global deal on climate change at Copenhagen.

Hundreds of billions of dollars are needed to help countries adapt to the effects of climate change.

But over the past few years, a deep level of mistrust has built up among developing nations about financial pledges made by rich countries.

For the Wednesday Documentary, Rob Young goes to Liberia to assess what has gone wrong, and talks to some of the key players ahead of the Copenhagen meeting on climate change.