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All of the Following Are Long-Term Challenges Associated with High-Yield

Question 10

Multiple Choice

All of the following are long-term challenges associated with high-yield marginal farmlands in the U.S.except:


A) loss of topsoil.
B) high cost of fossil fuel.
C) decreasing salinity of soil.
D) silting of irrigation works.
E) high cost of fresh water.

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