事实上，在经历了20年廉价充足的能源供应（甚至还有余量可供出口 ） ， 新的昂贵、稀缺、进口能源周期已经开始。 石油产量自1998年以来下降了三分之一，天然气产量自2004年以来下降了15 % 。
Indeed, after two decades of cheap, abundant energy and exports of surplus output, a new cycle of expensive, scarce, and imported energy has begun, as oil production has fallen by one-third since 1998, and gas production by 15% since 2004.