Water diversion and irrigation has allowed humans to grow crops in areas where natural supplies have been limited. A major challenge that exists in these regions has been ________
A) high pesticide use
B) soil erosion
C) salinization of soils
D) low crop diversity
E) high trophic-level efficiency
C
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The force that results from a difference in atmospheric pressure between two locations is called ________.
Fill in the blank(s) with the appropriate word(s).
What is standard sea level pressure in millibars, in inches of mercury, and in pounds per square inch?
What will be an ideal response?
When you comb your hair and electrons are rubbed onto the comb, your hair becomes
A. positively charged. B. ionized. C. negatively charged. D. none of the above
Which factor(s) weakened the Commonwealth of Independent States?
A) Ukraine's departure B) Eastern Europe's expansion to NATO C) annexation of Crimea D) all of the above E) none of the above