投资高效工厂能节余很多宝贵的碳信用额度，可以用来卖给那些更富有、更浪费的国家。
By investing in efficient plant it could generate lots of valuable carbon credits to sell to wealthier, more wasteful nations.
那些超出配额的人则不得不购买等量的碳信用额度。
People who fly more than that would have to buy carbon credits on the equivalent of a credit card.
其他则通过购买碳信用额度的方式来遵守京东议定。
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