Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. Hydraulic fracturing is a method of extracting natural gas from deep underground, in places where conventional technologies are ineffective, by pumping liquids down a well in rocks, under pressures that are high enough to fracture the rock. Though characterized as a rather safe technology used in more than 1 million wells in the last 70 years, the fracking process comes under criticism, largely associated with air pollution, earthquakes, as well as contaminating drinking water supplies with cancer-causing chemicals. To find out more about hydraulic fracturing, its advantages and disadvantages read this book.
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