3. Costa Rica

EPI score: 86.4

GDP per capita: $9,600

Population: 4.5 million

That such a relatively poor and developing country ranks third in the EPI is testament to the natural endowments of Costa Rica, with dense forests, plentiful water and abundant wildlife. With smart development, Costa Rica can avoid the standard path that growing nations take of polluting their environment, only to clean it up again once they become wealthy. Costa Rica touts its EPI ranking in ads for its tourism sector....

Read More: Forbes - World's 10 Cleanest Countries 

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