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Johnnyvic Johnnyvic
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6 years ago
The primary cause of desertification in the world today is
  a. increased salinity resulting from irrigation practices.
  b. overgrazing of marginal lands.
  c. clearing and degradation of tropical forests.
  d. herbicide and fertilizer runoff.
  e. use of water for industry.

Question 2

The new, high-yield crops require which of the following that cannot be supplied by subsistence
  agriculture?
  a. irrigation
  b. pesticides
  c. fertilizers
  d. fossil fuel energy
  e. all of these
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Replies
wrote...
6 years ago
Answer to q. 1

B

Answer to q. 2

E
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