首先，此类事件的真实成本不大可能由BP公司负责，因为事件对生态系统服务功能的很多负面效果仅受市场力量的间接影响。

First and foremost, it is unlikely that the true cost of such an event was accounted for by BP, because many of the effects on ecosystem services are only indirectly influenced by market forces.

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“千禧生态系统评估”的负责人沃尔特·里德说，在过去50年中，人类对生态系统的改造比历史上的任何时期都更为迅速而广泛。

Walter Reid, director of the Millennium Ecosystem Assessment, said over the past 50 years humans had changed ecosystems more rapidly and extensively than any comparable period in human history.

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