In this photo supplied by World Wildlife Fund and taken Aug, 2016, Stiegler's Gorge is shown in Tanzania's Selous wildlife reserve, which is described by the United Nations as one of Africa's biggest remaining wilderness areas. The Tanzanian government wants to build a hydropower dam in the gorge; conservationists say the project could cause serious damage to the protected area and jeopardize the livelihoods of people who rely on fishing there. (Greg Armfield, WWF).
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