Title |
Comment |
Keywords |
Soil Erosion
|
19:20 - 20:45 (01:25) / 2.0 MB
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"Richard Hazlett", "soil erosion", tropic, "rain forest", "Midwestern United States", "dust bowl", draught, wind, soil, weathering, dust, grassland, agriculture, glacial, plant, crop, topsoil, farming
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Prevention of Desertification
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23:44 - 24:47 (01:03) / 1.6 MB
|
"Art Montana", desertification, "water conservation", groundwater, agriculture, deforesting, vegetation, subtropic, wind, topsoil, tree, Africa, pollution
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Geology School Keywords
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