透过二氧化碳总量管制与排放交易机制(cap - and - trade scheme)，欧盟已经限制了温室效应气体的排放，去年又为碳撷储颁布进一步的优惠诱因。

The European Union, which already restricts greenhouse-gas emissions through a cap-and-trade scheme, unveiled further incentives for CCS last year.

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制度规避有其内在的诱因，它受行为主体观念与利益诉求的影响，与制度本身的局限性和运行机制密切相关。

With its internal cause, regulation withdrawal is affected by the subject's mind and demand and closely associated with the limitations and operative mechanism of regulations.

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当然，一项行为之所以流行，就跟病毒流行一样，肯定背后有起诱因或者触发机制，“挑战冰桶”是怎么这样传递下去的呢？

Of course, a behavior is so popular, just like a virus epidemic, certainly with trigger mechanism or incentive. Then how "Ice Bucket Challenge" spread?

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