Which of the following is NOT a problem of subsistence agriculture?
A) It is subject to soil and precipitation variability.
B) a lack of tools and high yielding seed
C) Non-food crops, such as sugar and jute, become attractive to subsistence farmers due to the high prices they can get on the export market.
D) Subsistence farmers can often barely provide for their families.
E) Subsistence farmers suffer from a lack of capital.
C
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When the U.S. city of Fort Worth, Texas, instituted a fee-per-bag waste collection program, the proportion of households recycling their trash plummeted from 85% to 21%.
Answer the following statement true (T) or false (F)
Short-term climatic events, such as the Little Ice Age, may be caused by:
a. variations in solar energy. b. large volcanic eruptions. c. Milankovitch cycles. d. variations in solar energy AND large volcanic eruptions. e. No one really knows.
The average automobile is only about ________ % efficient at moving itself down the road
A) 62 B) 14 C) 85 D) 27 E) 6.5
Choose the surface that has the highest albedo.
A. Asphalt B. Water C. Fresh snow D. Grass