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Shale Gas

Does the hon. Gentleman accept that notwithstanding what he properly identifies as the relationship between gas and oil prices, and the possibility of decoupling, shale gas—unconventional gas—is a relatively expensive part of the gas extraction spectrum, and will remain so regardless of what its plentifulness suggests? Therefore, if gas prices decouple and go below a certain point, the gas becomes uneconomical to extract and regulates itself to some extent on the basis of its unconventionality.