By Paul Homewood
Following up the Lake Chad post, this is a highly relevant contribution by science writer, Fred Pearce, in Yale 360 last October:
The Hadejia-Nguru wetland was once a large green smudge on the edge of the Sahara in northeast Nigeria. More than 1.5 million people lived by fishing its waters, grazing their cattle on its wet pastures, and irrigating their crops from its complex network of natural channels and lakes. Then, in the 1990s, the Nigerian government completed two dams that together captured 80 percent of the water that flowed into the wetland.
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