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Oct 18, 2018, 3:29 pm128 ptsEcoWatch
By Tara Lohan For much of the 20th century humans got really good at dam building. Dams—embraced for their flood protection, water storage and electricity generation—drove industry, built cities and helped turn deserts into farms. The United States alone has now amassed more than 90,000 dams, half of which…
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