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Saturday, October 17, 2009
Environment - More on "A new technique that tapped previously inaccessible supplies of natural gas in the United States is spreading to the rest of the world"
The lead NY Times editorial today begins:
New York State’s environmental regulators have proposed rules to govern drilling in the Marcellus Shale — a subterranean layer of rock curving northward from West Virginia through Ohio and Pennsylvania to New York’s southern tier. The shale contains enormous deposits of natural gas that could add to the region’s energy supplies and lift New York’s upstate economy. If done carefully — and in carefully selected places — drilling should cause minimal environmental harm.But regulators must amend the rules to bar drilling in the New York City watershed: a million acres of forests and farmlands whose streams supply the reservoirs that send drinking water to eight million people. Accidental leaks could threaten public health and require a filtration system the city can ill afford.
Natural gas is vital to the nation’s energy needs and can be an important bridge between dirty coal and renewable alternatives. The process of extracting it, however, is not risk-free. Known as hydraulic fracturing, it involves shooting a mix of water, sand and chemicals — many of them highly toxic — into the ground at very high pressure to break down the rock formations and free the gas.
The technique is used in 90 percent of the oil and gas operations in the United States. And while most drilling occurs without incident, “fracking” has been implicated in hundreds of cases of impaired or polluted drinking water supplies in states from Alabama to Wyoming.
Posted by Marcia Oddi on October 17, 2009 07:33 PM
Posted to Environment