More environmental rules needed for shale gas, says Stanford geophysicist

The topic is controversial. Breaking up rock layers thousands of feet underground with hydraulic fracturing has unleashed so many minuscule bubbles of methane that shale gas now accounts for 30 percent of U.S. gas production, an increase in supply that has pummeled the commodity's price. The gas industry will support more than 600,000 jobs by the end of the decade, Obama said.
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But environmental concerns about the technology behind the boom – specifically hydraulic fracturing – receive near daily news coverage, with opponents saying that toxic additives in the water used for the fracturing have found their way into household tap water, among other concerns.

Obama said natural gas producers will have to disclose the chemicals they add to the fracturing slurry of water and sand when they are working on federal lands. The Secretary of Energy's seven-person advisory group on shale gas, of which Zoback was a member, called for such disclosure by shale gas operators on all lands. The advisory group further recommended that data on a well-by-well basis be posted on publicly available, searchable websites.