A tax on upstream carbon sources is one easy way to put a price on carbon emissions, although some countries may wish to use other methods, such as emissions trading schemes.

对上游碳资源征税是为碳排放定价的一种简单方法，尽管一些国家可能希望使用其他方法，例如碳排放交易计划。

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Then there is the debt that set off this crisis: mortgage debt. Overly easy mortgage borrowing financed the house-price bubble.

这些债引发了危机：抵押贷款，很容易就能办到的抵押贷款造成了房地产价格泡沫。

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For the United States, the consequence was elevated consumption facilitated by asset price inflation, easy underwriting standards for credit and structural budget deficits.

对于美国来说，结果就是资产价格上涨、宽松的信贷担保标准以及结构性财政赤字，为消费水平不断上涨提供了便利。

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And although it has convincingly shown itself able to confound the efforts of retailers to avoid easy and direct price comparisons, it has a harder time dealing with what their suppliers do.

ECONOMIST: Intelligent agents

Unfortunately, the stock price is easy for executives to manipulate, sometimes over long periods of time.

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But that security seems to come at the price of easy legibility for humans.

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