What is the purpose of crop rotation?
A) maintaining fresh products for market
B) maintaining price supports
C) maintaining the fertility of fields
D) responding to shifting consumer preference
E) reducing transportation costs
Answer: C
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Which region generates the fewest refugees?
A) USA-Canada B) England-France-Germany C) Brazil-Colombia-Venezuela D) Bangladesh-India-Pakistan E) Cambodia-Indonesia-Vietnam
Suppose the present concentration of CO2 doubled in 100 years, and climate models predicted a 5oC increase in Earth's average temperature. Which of the following gases must also increase in concentration?
A. oxygen B. nitrogen C. methane D. water vapour
________ became Africa's newest independent country on July 9, 2011
A) Zimbabwe B) Sierra Leone C) The Gambia D) South Sudan
Among the world's MDCs, the U.S. has the greatest wealth inequality, meaning wealth is concentrated among relatively few people
a. True b. False Indicate whether the statement is true or false