Human use of groundwater has _______ over time.
Which of the following is not a source of groundwater pollution?
Aquifers are _______.
Compare the use of groundwater in preindustrial times to industrial times.
What are some ways that groundwater is used in the United States currently?
What approximate percentage of the Earth’s freshwater is groundwater?
Why has groundwater use increased over time?
Groundwater overdraft occurs when _______.
Explain how groundwater overdraft occurs and its likely consequences.
Explain the importance of groundwater as a source of freshwater.
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