The Environmental Performance Index (EPI) is
produced jointly by Yale University and Columbia University in collaboration
with the World Economic Forum. Policymakers, scholars, non-governmental
organizations, and the media have relied upon the biennial release of the EPI
for policy insights and tracking of trends in sustainability. The EPI turns the
latest advances in environmental science with worldwide datasets to form into a
powerful summary of the state of sustainability around the world. The EPI
serves as a communication tool for translating complex ideas into simpler, more
useful forms.
The single, 0–100 score for each country serves as
a starting point for deeper discussions. Country scores on the EPI are
translated into rankings. The EPI rankings are intended to inspire countries to
engage in healthy competition, vying to rise to the top of their peer groups.
Backcasting EPI scores from historic data allows countries to track their
progress over time. In these ways, the EPI offers a number of insights that are
useful for identifying best practices, informing policy agendas, and setting
priorities in environmental governance.
Data analysis for the 2018 EPI was based on creating a
composite index. The researchers began by gathering data on 24 individual
metrics of environmental performance. These metrics were aggregated into a
hierarchy beginning with ten issue categories: Air Quality, Water &
Sanitation, Heavy Metals, Biodiversity & Habitat, Forests, Fisheries,
Climate & Energy, Air Pollution, Water Resources, and Agriculture.
These issue categories were then aggregated into two policy
objectives – Environmental Health and Ecosystem Vitality – and then finally the
overall EPI. These metrics provide a gauge at a national scale of how close countries
are to established environmental policy goals. The EPI thus offers a scorecard
that highlights leaders and laggards in environmental performance, gives
insight on best practices, and provides guidance for countries that aspire to
be leaders in sustainability.
The 2018 Environmental Performance Index (EPI) ranks 180
countries. The top five countries are:
1.
Switzerland
2.
France
3.
Denmark
4.
Malta
5.
Sweden
The bottom five countries are:
176. Nepal
177. India
178. Dem. Rep. Congo
179. Bangladesh
180. Burundi
Some of the other rankings of interest are:
27. US
70. Sri Lanka
120. China
169. Pakistan
In general, high scorers exhibit long-standing
commitments to protecting public health, preserving natural resources, and
decoupling greenhouse gas (GHG) emissions from economic activity. Switzerland
leads the world based on strong performance across most issues, especially air
quality and climate protection. India and Bangladesh come in near the bottom of
the rankings.
Low scores on the EPI are indicative of the need
for national sustainability efforts on a number of fronts, especially cleaning
up air quality, protecting biodiversity, and reducing GHG emissions. Some of
the laggards face broader challenges, such as civil unrest, but the low scores
for others can be attributed to weak governance. The EPI draws attention to the
issues on which policymakers must take further action.
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