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The First Island in The World to be Powered Fully by Wind And Water

A view of the wind turbines on El Hierro image via jose mesa/flickr. Creative Commons 2.0 license.
 
The smallest and southernmost of Spain’s Canary Islands is about to make an outsized mark on the path toward a more renewable energy-powered future.
 
With the opening of a new wind farm next month, El Hierro, population just over 10,000, will become the first island in the world to be fully energy self-sufficient through combined wind and water power. The five wind turbines will provide 11.5 megawatts of power, enough to meet the demand of the population and the desalination plants on this small crop of land off the coast of Africa in the Atlantic Ocean.
 
When the wind isn’t blowing, hydropower will fill the void. When the wind is blowing, power will be used to pump water into a reservoir in a volcanic crater about 2,300 feet above sea level. Then when power is needed, that water will be released down to a lower reservoir and used to generate electricity on the way. This process is known as pump-storage hydroelectricity, and is used in many other countries across the globe — including the world’s largest outside of Washington, D.C.
 
“This system guarantees us a supply of electricity,” said the director of the Gorona del Viento wind power plant, Juan Manuel Quintero.
 
With the $75 million project set to come online, El Hierro will no longer have to rely on costly and dirty diesel generators for electricity — although it will maintain an oil power station just in case. According to Phys.org, the island’s transition to renewable energy will cut carbon dioxide emissions by 20,600 tons per year and save the island from using 40,000 barrels of oil a year.
 
Other islands are taking advantage of renewable resources to become wind- and solar-powered, but El Hierro is believed to be the first to do so exclusively with wind and hydro power and without having any connection to an outside electricity grid. 

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