Energy expert and Pulitzer Prize winner Daniel Yergin told the Philadelphia Inquirer that America’s gigantic reserves of shale gas are not just some promising opportunity. The way he sees it, shale gas has already changed the country’s energy outlook:

“Shale gas has come on really fast. But people don’t realize it’s 30 percent of our gas production. It’s not a question of whether to do it or not. It’s happened,” Yergin said.

The author of The Prize, which was awarded a Pulitzer Prize for non-fiction in 1992, Yergin is the co-founder and chairman of Cambridge Energy Research Associates, an energy research consultancy.

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