18. Salt water intrusion is associated with a. natural gas fracking b. the deple

Question

18. Salt water intrusion is associated with a. natural gas fracking b. the depletion of aquifers c. the construction of dams and levees. d. the diversion of surface waters 19. Benefits of dams include all of the following except a. providing a more stable, year-round water supply in some regions b. generating electricity c. providing flood control for areas downstream. d. increasing habitat quality for native fishes 20. Which food would require the most water to produce? a. a pound of lettuce b. a pound of rice c. a pound of beef d. a pound of corn 21. Which is a consequence of sewage pollution? public health risks due to presence of disease-causing organisms decreased oxygen content of water a. b. nutrient enrichment of water all of the above c. d.

Explanation / Answer

ANSWER

18. C. Construction of dams and leaves.

Saltwater intrusion into the deltas means that the saline water cannot be used for irrigation.

19. C. Providing flood controls for areas downstream.

Farmers are affected by Downstream, who were waiting for the flood of fields to plant their seeds.

20.B. a pound of rice.

Corn and lettuce are shallow-rooted and do not do well without too much water

21. D. all of the above

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