Title |
Comment |
Keywords |
Development and Overgrazing
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19:48 - 20:49 (01:01) / 1.9 MB
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vegetation, humans, atmosphere, plant, tree, air, climate, rainfall, semi-arid, desert, desertification, agriculture, grazing
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Sahel
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21:42 - 23:02 (01:20) / 2.3 MB
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desert, desertification, Africa, Sahel, Sahara, semi-arid, rainfall, grazing, drought, plant, soil, cattle, "dust storm", dune, Ethiopia, Sudan, human
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Geology School Keywords
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