Final answer:
Groundwater shortages can be caused by pollution, excessive use, and lack of precipitation.
Step-by-step explanation:
Groundwater shortages can occur due to several factors, including pollution, excessive use that exceeds the rate of replenishment, and lack of precipitation. Pollution can contaminate groundwater sources, making them unsuitable for use. Excessive use of groundwater without allowing sufficient time for it to replenish can deplete the groundwater reserves. Additionally, a lack of precipitation reduces the recharge of groundwater, leading to shortages.
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