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Bill Gates backs a Tobin tax

2 November 2011 Last updated at 19:55 GMT

Microsoft founder Bill Gates has spoken to the BBC about asking the G20 to step up development efforts to ease poverty and his backing of a tax on financial transactions.

Mr Gates is to submit a report to the G20 group of advanced and emerging economies at a two-day summit in Cannes.

He told the BBC's George Alagiah that "steps have to be taken to restore confidence" that governments will pay their debts.

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