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Human Impact on the Water Cycle
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Farms often use water pumped from underground reservoirs to irrigate their crops.
Water slowly creeps into caves like these (over the course of thousands of years) and humans are sucking this non-replenishible water dry!
That means that, when the water runs out, we're probably going to have crop shortages!
This is an unsustainable way of living.
With this extra water, humans have been able to build massive cities and sustain themselves...
but what will we do when the water runs out?
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