In developed countries, the most recent increases in agricultural productivity have come from ________
A) irrigation in arid areas
B) clearing rainforests
C) extensive drip irrigation use in farming
D) clearing grasslands and savannas
E) new crop varieties and polyculture techniques
Answer: E
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A) Uranium B) Natural gas C) Oil D) Coal
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What will be an ideal response?
Erosion of the Precambrian igneous and metamorphic core of the uplifted Ancestral Rockies
produced thick fans of arkose and conglomerate. Indicate whether the statement is true or false.
Which of the following is not true of the subarctic climate regions of Canada and Asia?
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