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A Craving for Hydropower

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Science  23 Jul 2010:
Vol. 329, Issue 5990, pp. 384
DOI: 10.1126/science.329.5990.384

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The reason Chile must build at least seven new hydrodams, sponsors of the projects say, is that forecasts show that the country desperately needs more electricity—and that it must come from Chilean sources. Environmentalists and independent energy analysts have challenged this view; they argue that by improving efficiency and investing in renewable energy, Chile could find more than enough power within its borders for at least a decade—and without more dams. So far, however, energy planners have not been persuaded.