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Answer:
Hydraulic fracturing, or fracking, is a multistep extraction process in which fossil fuel-bearing rock formations are drilled and fractured using huge amounts of water. Oil and gas reserves that were at one time considered inaccessible are now available to be exploited. While the fracking process has expanded oil and gas development, it has also expanded risks to water resources.
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Answer:
What change allowed Europeans to travel further into Africa
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