The environmental impacts of resource extraction are more than the sum of their parts. ~ American ecologist Morgan Tingley
Copious ancient vegetative remains lay trapped in shale: clastic (fragmentary) sedimentary rock formed by heat and pressure over millions of years; the same processes which manufacture the fossil fuels of intense interest to industrial societies.
That the flow rates of oil and gas wells can be improved via high-pressure injection of fluids through wellbores was discovered in the 1940s. By 1965, this technology was applied to shale deposits. Fracking (hydraulic fracturing) was an extension on fracturing techniques applied in the 1860s to stimulate shallow, hard-rock oil wells.
The practice of fracking shale spread to sites in Canada, Germany, the Netherlands, and Britain in the 1970s.
Widening the application scope of fracking practices, Texas operators started horizontal fracking in the late 1970s. Horizontal wells are often more effective than vertical ones in shale, as sedimentary layers are horizontal, and so potential fuel sources are best targeted with lateral injection.
With the massive slosh of money seeking investment havens during 1st decade of the 21st century, investors sunk fulsome funds into fracking, fueling a boom in the US. As the price mechanism never works in a timely manner, the fracking bubble burst in early 2015, as oil and gas prices plummeted from oversupply.
Not to be outdone in the rush to self-destruction, China surged pell-mell into a fracking boom in the 2010s.
Ordinary oil and gas wells are concentrated pollution sites unto themselves. Soil nearby is contaminated beyond redemption. And wells commonly leak. This contaminates soil in a wider area, and poisons local groundwater and nearby surface water bodies.
Fracking up-scales the environmental destruction of oil and gas extraction to an incredible level. Fracking is so bad that it makes coal look clean by comparison.
Fracking requires massive quantities of water. Community water-supply wells have gone dry from water extraction for fracking.
Disposal of fracking return fluids remains a big challenge. ~ American environmental scientist Robert Howarth
The water used for fracking is heavily polluted with brine and toxic chemicals which cannot be cleared out. In a single year, over 1 billion cubic meters of toxic wastewater is generated by fracking in the US. Much of this voluminous waste is not contained.
Chemicals traveled from shale gas wells more than 2 kilometers in the subsurface to drinking water wells. ~ American geoscientist Susan Brantley
Widespread spillage from fracking destroys the vitality of the soil and water that it touches. No area where fracking occurs has decent drinking water. The water supplies of Oklahoma and Texas are especially fouled from fracking.
Communities living with fracking have known for years that fracking pollutes drinking water. ~ American chemist Lauren Pagel
The US areas fracked are those without an abundant freshwater supply. Fracking accelerates water shortages.
Via intense injection pressure on sedimentary rock formations, fracking consistently produces earthquakes that extend far beyond the fracking field.
It has been recognized since the 1960s that fluid injection into the subsurface can trigger earthquakes. ~ American geophysicist Cliff Frohlich
In 2008, before the fracking boom, there were 2 earthquakes in Oklahoma. In 2015, there were 890 that measured 3.0 or higher.
The sharp rise in Oklahoma seismicity since 2009 is due to wastewater injection. ~ English mathematician and physicist Thea Hincks et al
Fracking has made nearby residents sick and turned natural landscapes into brownfields. Over 150,000 hectares have been contaminated from the 90,000 fracking sites in the US.
You feel violated. How can they come in and do this? ~ Veronica Kronvall, American homeowner living near a fracking site
Those are just the terrestrial effects. Fossil fuel wells pollute the air and release voluminous potent greenhouse gases into the atmosphere.
American government officials at every level have consistently supported fracking. The Bush Jr. administration exempted fracking from the Safe Drinking Water Act.
Earthquakes caused by fracking are ignored by regulators. Fines are levied only for the most spectacular spillages and pollution events. The fines themselves are always an infinitesimal fraction of the economic and environmental damage done, and never enough to deter continuance.
Hydraulic fracturing is being done safely under the strong environmental stewardship of state regulators and industry-best practices. ~ Erik Milito of the American Petroleum Institute