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USGS CMG InfoBank Geology School: grazing

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Title Comment Keywords
Development and Overgrazing 19:48 - 20:49 (01:01) / 1.9 MB vegetation, humans, atmosphere, plant, tree, air, climate, rainfall, semi-arid, desert, desertification, agriculture, grazing
Dust Bowl 20:49 - 21:42 (00:53) / 1.1 MB desertification, desert, "United States", "Great Plains", "ecological balance", rainfall, plant, agriculture, grazing, soil, drought, "dust bowl", "soil conservation"
Sahel 21:42 - 23:02 (01:20) / 2.3 MB desert, desertification, Africa, Sahel, Sahara, semi-arid, rainfall, grazing, drought, plant, soil, cattle, "dust storm", dune, Ethiopia, Sudan, human
Large Migration Disaster 23:02 - 23:44 (00:42) / 1.8 MB technology, drought, water, Sahel, livestock, humans, grazing, cattle, crop
Geology School Keywords
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URL: http://walrus.wr.usgs.gov/infobank/programs/html/school/keypage/grazingaler.html
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Page Last Modified: Thu Oct 31 04:24:36 PDT 2013  (chd)