Multiple Choice
In the context of externalities, how does globalization cause the foreign sector to influence a country's economy?
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7. Externalities
Externalities: Social Benefits and Social Costs
Multiple Choice
Overuse of groundwater in coastal areas would most likely result in which of the following?
A
Lower risk of flooding
B
Increased agricultural productivity
C
Saltwater intrusion into freshwater aquifers
D
Improved water quality for local communities
Verified step by step guidance1
Step 1: Understand the context of groundwater use in coastal areas. Groundwater is stored in aquifers, which are underground layers of water-bearing permeable rock or materials.
Step 2: Recognize that overuse or excessive pumping of groundwater in coastal regions can lower the water table, reducing the pressure that keeps seawater from moving inland.
Step 3: Identify the consequence of this pressure reduction: seawater can intrude into freshwater aquifers, a process known as saltwater intrusion.
Step 4: Understand that saltwater intrusion contaminates the freshwater supply, making it unsuitable for drinking and irrigation, thus negatively affecting water quality.
Step 5: Conclude that the most likely result of overusing groundwater in coastal areas is saltwater intrusion into freshwater aquifers, rather than lower flooding risk, increased agricultural productivity, or improved water quality.
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