New York Times: A confrontation between the insatiable appetite for energy and the enduring need for habitability is under way in Brazil as it moves aggressively to harness the power of its rivers with plans for dozens of hydroelectric dams. Such projects are engineering and aesthetic marvels that provide hydroelectric power and can also control floods and direct water for irrigation. But they also divert rivers, destroy animal habitat, displace entire communities and drown vast amounts of land beneath reservoirs….

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