ST ANDREWS, SCOTLAND - NOVEMBER 07: The Chairman of the U.S. Federal Reserve Ben Bernanke (L) watches as U.S. Treasury secretary Timothy Geithner (C) talks to France's Finance Minister Christine Lagarde during a break at the G20 Finance Ministers meeting on November 7, 2009 in St Andrews, Scotland. British finance minister Alistair Darling urged his G20 counterparts on Saturday to work toward a $100 billion deal on tackling climate change as developing nations held firm they did not want to talk about it. Getty Images logo Getty Images 3 weeks ago

ST ANDREWS, SCOTLAND - NOVEMBER 07: The Chairman of the U.S. Federal Reserve Ben Bernanke (L) watches as U.S. Treasury secretary Timothy Geithner (C) talks to France's Finance Minister Christine Lagarde during a break at the G20 Finance Ministers meeting on November 7, 2009 in St Andrews, Scotland. British finance minister Alistair Darling urged his G20 counterparts on Saturday to work toward a $100 billion deal on tackling climate change as developing nations held firm they did not want to talk about it.