Energy Out of the Blue: Generating Electric Power from the Clash of River and Sea Wat

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In the hunt for alternatives to polluting and climate-warming fossil fuels, attention has turned to where rivers meet the sea. Here, freshwater and saltwater naturally settle their salinity difference, a phenomenon that two pioneering projects in Europe will try to harness to generate clean energy. [More] (http://www.scientificamerican.com/article.cfm?id=salt-power-energy)

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