Part of the reason for this run is that there has been some very heavy rainfall, and Quartz reports that Costa Rica's hydroelectric plants are giving that country pretty much all of the power it needs. Costa Rica also gets power from geothermal, wind, biomass and solar sources.

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Science Alert points out that Costa Rica is a small country — about half the size of Kentucky and home to 4.8 million people — and that its major industries are tourism and agriculture. It doesn't have to face the demand that might be brought if it had heavy manufacturing.

In addition, Engadget points out that if there's a drought, Costa Rica would likely turn back to fossil fuel very quickly.

Costa Rica is not alone in its commitment to green energy. Quartz reports Iceland gets its energy from renewable sources — mainly geothermal — while the Netherlands' tiny island territory, Bonaire, is close to 100 percent renewable energy thanks to algae.