Chalk it up to the “price of progress” … about 180 times.

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Opposition to the hydraulic fracturing of deep shales to release natural gas rose sharply last year over worries that the large volumes of chemical-laden water used in the operations could contaminate drinking water. Then, in early January, earthquakes in Ohio were blamed on the disposal of that water in deep underground structures. Yesterday, two Cornell University professors said at a press conference that fracking releases large amounts of natural gas , which consists mostly of methane , directly into the atmosphere — much more than previously thought.

Robert Howarth, an ecologist and evolutionary biologist, and Anthony Ingraffea, a civil and environmental engineer, reported that fracked wells leak 40 to 60 percent more methane than conventional natural gas wells. When water with its chemical load is forced down a well to break the shale, it flows back up and is stored in large ponds or tanks. But volumes of methane also flow back up the well at the same time and are released into the atmosphere before they can be captured for use. This giant belch of "fugitive methane" can be seen in infrared videos taken at well sites.

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Currently, pipeline leaks are the main culprit, but fracking is a quickly growing contributor. Ingraffea pointed out that although 25,000 high-volume shale-gas wells are already operating in the U.S. , hundreds of thousands are scheduled to go into operation within 20 years, and millions will be operating worldwide, significantly expanding emissions and keeping atmospheric methane levels high despite the 12-year dissipation time.

Howarth said he is particularly concerned about fracking emissions because recent data indicates that the planet is entering a period of rapid climate change. He noted that the average global temperature compared with the early 1900s is now expected to increase by 1.5 degrees Celsius within the next 15 to 35 years, which he called "a tipping point" toward aggressive climate change. More and more fracking would speed the world to that transition or undermine efforts to reduce emissions of CO2 and other greenhouse gases . The notion, Ingraffea said, that shale gas is a desirable "bridge fuel" from oil to widespread renewable energy supplies several decades from now "makes no sense" in terms of climate change.

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