| 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
|
