Question: A nation started to extract sorghum from its arable fields in the 1 9 5 0 s . By the 1 9 7 0 s
A nation started to extract sorghum from its arable fields in the s By the s the land could not yield sorghum or any similar plant because all the soil nutrients had been depleted. Then in the to s the region started to grow cotton. This is an example of what unsustainable model?
Low taxpyramid
Resource pyramid
Export substitution
Import substitution
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