Fracking

Overview

Fracking, short for hydraulic fracturing, involves blasting fluid deep underground to fracture bedrock and access previously unreachable crude oil and natural gas reserves. The technique is often done in L-shaped wells—drilled down vertically and then horizontally—to maximize output.

After drilling, a mixture of water, chemicals, and sand or clay is injected into the well, causing the rock to crack and release fossil fuels, which are pumped up to the surface. Water makes up more than 90% of the mixture and provides the pressure that creates the fissure. The sand or clay keeps the fissures open, while the chemicals primarily dissolve debris, reduce friction, and kill bacteria.

Fracking boomed in the US in the early 2000s, when innovations in horizontal drilling and 3D seismic imaging made it more economically viable, coinciding with geopolitical tensions that prompted a shift toward reduced dependence on foreign energy. However, the method raises several environmental concerns, including the potential to contaminate drinking water, discharge wastewater into local ecosystems, and increase earthquake risk.

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