In its new World Energy Outlook (WEO), the IEA is cautious about the prospects of unconventional oil and gas outside the US. As regards shale gas, it notes that “uncertainty remains over the quality, the costs and public acceptance.” Yet in an interview with Energy Post, IEA Executive Director Maria van der Hoeven notes that “the gas is there. All geologists are agreed on that.” Moreover, “there may be other surprises in store, for example with methane hydrates”, she says. “We cannot rule out that new revolutions may take place.”

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