Comment: 18:16 - 19:00 (00:44)
Source: Annenberg/CPB Resources - Earth Revealed - 22. Wind, Dust and Deserts
Keywords: "James Sadd", desert, climate, topography, "plate tectonics", forest, prairie, grassland, humans, desertification, environment
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Our transcription: The desert, like any environment on Earth, is the result of a critical balance of geologic conditions.
Climate, topography, and plate tectonics interact to determine whether an area will be, say, a desert, or a forest, or a prairie grassland.
Human activity, however, is capable of disrupting this natural balance, triggering a chain of events that can cause deserts to invade a non-desert region.
This process called "desertification" can be frightening rapid and its consequences staggering.
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Geology School Keywords
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