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hellink hellink
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6 years ago
Swidden, or slash-and-burn, agriculture increases the energy that a given unit of land produces for humans by
 
  A) burning felled trees to fertilize the soil with the ashes.
  B) using land and labor to the fullest extent possible.
  C) converting grassland to wheat fields.
  D) growing grass to raise cattle.
  E) none of the above.
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6 years ago
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