Comment: 19:00 - 19:48 (00:48)
Source: Annenberg/CPB Resources - Earth Revealed - 22. Wind, Dust and Deserts
Keywords: vegetation, air, rainfall, Sun, plant
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Our transcription: Consider a fertile spot like this.
Its most obvious characteristic is its color, green.
The green color arises because the vegetation absorbs the sun's energy in all wavelengths except that of the color green.
This absorption of energy means there is less heat available to warm the overlying air, so the air is cooler and more likely to produce rain.
The chance of rain is further increased by the fact that the vegetation is an important source of water vapor released to the air through leaves.
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Geology School Keywords
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