Stephen Green, head of China Research of Standard Chartered Bank, said the swap deals would help encourage the use of the yuan as the currency of choice for international trade.

渣打银行中国区研究主管王志浩表示，通货互换能够有效促进人民币成为国际贸易货币。

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Currency appreciation thus seems the obvious solution. However, Stephen King and Stuart Green, economists at HSBC, argue in a recent report that it raises many awkward questions.

本币升值看上去是个简单办法，但是汇丰银行的经济学家Stephen King和Stuart Green在近期报告中指出，升值诱发太多问题。

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But green rates do more for farmers than stave off currency changes.

但是，绿色兑换率是为了保护农民的利益，不是为了防止货币变化。

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Banco Verde Vida (Green Life Bank) pays with its moeda verde (green currency) for recyclable materials such as plastic bottles, tins and used cooking oil.

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How many entrepreneurs will invest in new food and energy sources when a currency is collapsing, investors are fleeing to speculation, and green wackos are blocking breakthroughs in nanotech and genetically modified food?

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If there is ever a collapse of the euro, being invested in assets that could be denominated in a German currency would amount to "catastrophe insurance, " said Peter Papadakos, of Green Street Advisors.

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