In this paper, some environmental policy instruments are analyzed based on economics, and some country cases are presented in the end.

本文从经济学角度比较分析各环境政策工具的有效适用性，并例举若干国家的实际应用成败经验。

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Masakazu Maezuru. Stochastic Differential Game of International Environmental Policy. Osaka University of Economics and Law.

前鹤政和。国际环境政策的随机微分博弈。大阪経済法科大学経済学部。

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But,the focus turned on Hayward, says economic and environmental policy expert Robert Faulkner of the London School of Economics.

VOA: standard.2010.07.27

While studying for my course in Environmental Economics (at the nth moment and the night before my Environmental Policy exam, I might add) I came across what is commonly known as the Precautionary Principle.

FORBES: InfosysVoice: Internally or externally, the environment figures in a business plan