Environmental Performance Index

The Environmental Performance Index EPI is constructed through the calculation and aggregation of 20 indicators reflecting national level environmental data These indicators are combined into nine issue categories, each of which fit under one of two overarching objectives The two objectives that provide the overarching structure of the EPI are Environmental Health and Ecosystem Vitality Environmental Health measures the protection of human health from environmental harm Ecosystem Vitality measures ecosystem protection and resource management These two objectives are further divided into nine issue categories that span high priority environmental policy issues, including air quality, forests, fisheries, and climate and energy, among others The issue categories are extensive but not comprehensive Underlying the nine issue categories are 20 indicators calculated from country level data and statistics After more than 15 years of work on environmental performance measurement and six iterations of the EPI, global data are still lacking on a number of key environmental issues These include freshwater quality, toxic chemical exposures, municipal solid waste management, nuclear safety, wetlands loss, agricultural soil quality and degradation, recycling rates, adaptation, vulnerability, and resiliency to climate change, desertification

环境绩效指数（EPI）系通过计算和汇总反映国家层面环境数据的20项指标而构建。这些指标被整合为九个问题类别，每个类别均隶属于两大根本目标之一。EPI的整体结构由两大目标提供，分别为环境健康与生态系统活力。环境健康衡量的是人类健康免受环境损害的保护程度；生态系统活力则衡量生态系统保护和资源管理。这两个目标进一步细分为涵盖高优先级环境政策问题的九个问题类别，包括空气质量、森林、渔业、气候与能源等。这些问题类别范围广泛，但并非详尽无遗。九个问题类别之下，是基于国家数据和统计数据计算出的20项指标。经过超过15年的环境绩效测量工作以及EPI的六次迭代，全球在众多关键环境问题上仍存在数据缺失，包括淡水质量、有毒化学物质暴露、市政固体废物管理、核安全、湿地损失、农业土壤质量与退化、回收率、适应能力、脆弱性和对气候变化的抗逆性，以及荒漠化等问题。