This is follow up information from propublica.org to an article posted last week; that article was about a local forum on Marcellus Shale and hydraulic fracturing or “fracking.”
“It takes brute force to wrest natural gas from the earth. Millions of gallons of chemical-laden water mixed with sand — under enough pressure to peel paint from a car — are pumped into the ground, pulverizing a layer of rock that holds billions of small bubbles of gas.
“The chemicals transform the fluid into a frictionless mass that works its way deep into the earth, prying open tiny cracks that can extend thousands of feet. The particles of sand or silicon wedge inside those cracks, holding the earth open just enough to allow the gas to slip by.
“Gas drilling is often portrayed as the ultimate win-win in an era of hard choices: a new, 100-year supply of cleaner-burning fuel, a risk-free solution to the nation’s dependence on foreign energy. In the next 10 years, the United States will use the fracturing technology to drill hundreds of thousands of new wells astride cities, rivers and watersheds. Cash-strapped state governments are pining for the revenue and the much-needed jobs that drilling is expected to bring to poor, rural areas.
“Drilling companies assert that the destructive forces unleashed by the fracturing process, including the sometimes toxic chemicals that keep the liquid flowing, remain safely sealed as much as a mile or more beneath the earth, far below drinking water sources and the rest of the natural environment.” Read the rest of this article and more here.
[EDITOR’S NOTE: This editorial in today’s Intelligencer Journal/New Era comments on “just how much” gas does the Marcellus Shale hold?]