2012 Environmental Performance Index and Pilot Trend Environmental Performance Index

The 2012 Environmental Performance Index (EPI) ranks 132 countries on 22 performance indicators in the following 10 policy categories: environmental burden of disease, water (effects on human health), air pollution (effects on human health), air pollution (ecosystem effects), water resources (ecosystem effects), biodiversity and habitat, forestry, fisheries, agriculture and climate change. These categories track performance and progress on two broad policy objectives, environmental health and ecosystem vitality. Each indicator has an associated environmental public health or ecosystem sustainability target. The EPI's proximity-to-target methodology facilitates cross-country comparisons among economic and regional peer groups.

The Pilot Trend Environmental Performance Index (Trend EPI) ranks countries on the change in their environmental performance over the last decade. As a complement to the EPI, the Trend EPI shows who is improving and who is declining over time.

The 2012 EPI and Pilot Trend EPI were formally released in Davos, Switzerland, at the annual meeting of the World Economic Forum on January 27, 2012. These are the result of collaboration between the Yale Center for Environmental Law and Policy (YCELP) and the Columbia University Center for International Earth Science Information Network (CIESIN). The Interactive Website for the 2012 EPI is at http://epi.yale.edu/.

2012年环境绩效指数（EPI）对132个国家在以下10个政策类别中的22项绩效指标进行排名：疾病环境负担、水资源（对人类健康的影响）、空气污染（对人类健康的影响）、空气污染（生态系统影响）、水资源（生态系统影响）、生物多样性和栖息地、林业、渔业、农业及气候变化。这些类别追踪环境健康和生态系统活力两大广泛政策目标的表现与进步。每个指标都关联一个环境公共卫生或生态系统可持续性目标。EPI的接近目标方法促进了不同国家在经济和区域同行群体之间的跨国比较。

试点趋势环境绩效指数（Trend EPI）对各国在过去十年环境绩效的变化进行排名。作为EPI的补充，Trend EPI展示了哪些国家在时间上有所改善，哪些国家有所下降。

2012年EPI和试点趋势EPI于2012年1月27日在瑞士达沃斯的世界经济论坛年会上正式发布。这是耶鲁环境法律与政策中心（YCELP）和哥伦比亚大学国际地球科学信息网络中心（CIESIN）合作的结果。2012年EPI的交互式网站位于http://epi.yale.edu/。