Costa Rica has now powered the entire country for more than 75 days using only renewable energy. The country hasn't needed fossil for all of 2015 thanks to hydropower and a heavy rainy season.
The nation of 5 million inhabitants also gets renewable energy contributions from a mix of solar, geothermal and wind power.
Because Costa Rica needs a steady flow of water to maintain such an impressive feat, the Central American nation has budgeted nearly $1 billion to tap into its many volcanoes, expanding its use of geothermal power.
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