Which of the following would be the most effective long-term solution to fighting desertification in the sahel?
a. planting trees throughout the sahel
b. constructing walls around villages to act as barriers against approaching sands
c. dropping loads of water over large areas of the sahel
d. using plows to remove sands from inhabited locations
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Which of the following would be the most effective long-term solution to fighting desertification in...
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