Editor's note

What happens to a country that disbands its military and invests the money saved in health and education? If Costa Rica is anything to go by, doing so makes that country the happiest and greenest place on Earth, according to international rankings. But as Ariana López Peña writes, measuring happiness and environmentalism in under-developed nations can generate deceptive results.

Enjoy this and the best of our content from the week, from religion in Pakistan to the endangered gorillas of the Central African Republic.

Megan Clement

Deputy Global Editor

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A man flies a kite at the Peace Park in San José, Costa Rica. Juan Carlos Ulate/Reuters

Is Costa Rica the world's happiest, greenest country?

Ariana López Peña, Universidad Nacional de Costa Rica

Environmental sustainability has a role in increasing national well-being.

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