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