Hydroelectric Dams Planned World’s Largest Rivers Threaten Fish

Nature World: Hydroelectric dam builders, and the need to curb greenhouse emissions, often underestimate the long-term effects these massive structures have on local biodiversity. In a new study, 30 leading aquatic ecologists warn impending dams in the Mekong, Amazon and Congo -- the world's three greatest and most diverse tropical rivers -- could have drastic impacts on the world's food supply. "These three river basins hold roughly one-third of the world's freshwater fish species," Kirk Winemiller, lead author......

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