An updated Pennsylvania State University economic study of the Marcellus Shale gas boom is even more bullish than past reports, projecting that Pennsylvania could supply a quarter of the nation's natural gas by 2020.

The industry-sponsored study, which will be released Wednesday, says that Marcellus natural gas production is outpacing predictions made only a year ago. Production from Pennsylvania wells, which already supply more fuel than is consumed in the state, could multiply eightfold by the end of the decade.

"Our estimates suggest that in 2020 the Marcellus industry in Pennsylvania could be creating more than $20 billion in value added, generating $2 billion in state and local tax revenues, and supporting more than 250,000 jobs," said the authors associated with Penn State's department of energy and mineral engineering.

The study is likely to generate considerable controversy. Anti-drill-

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