In the space of just a few years, the small Central American nation of Costa Rica has become a global laboratory for decarbonisation. Costa Rica is the world's only tropical country that has managed to reverse the process of deforestation: forests now cover more than half its surface. It’s also one of the few countries to get almost all its electricity (99 percent) from renewable sources. Costa Rica's inspiring and bold example reflects badly on major world powers, which have considerably more resources available to achieve their climate goals. Our regional correspondents Laurence Cuvillier and Matthieu Comin report.
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