A man sells pots at a marketplace in Burundi's capital Bujumbura, as the country awaits the results of Tuesday's presidential elections, July 23, 2015. REUTERS/Mike Hutchings
Denmark overtook Switzerland as the world's happiest place, according to a report on Wednesday that urged nations regardless of wealth to tackle inequality and protect the environment.
The report, prepared by the Sustainable Development Solutions Network (SDSN) and the Earth Institute at Columbia Un
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