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Hipervinculo Ciencias de la Tierra y Medioambiente
Bad farming practices and years of drought led the topsoil to blow away as giant dust storms during the Dust Bowl.
It is an educational content of CK-12 Foundation (to access some of the CK-12 contents ...
Hipervinculo Ciencias de la Tierra y Medioambiente
How human activities cause soil erosion.
It is an educational content of CK-12 Foundation (to access some of the CK-12 contents you must be logged in).
Hipervinculo Historia
Based on the clues, guess these things that happened from 1930 to 1949.
It is an educational content by JetPunk, site that contains a wide variety of quizzes.
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