美国天然及价格已经降到略高于4美元/百万英热（几年前高达13美元 ） ， 即使是谨慎的分析师也认为页岩能源革命将提振美国潜在经济增长并增加多大200万个新工作岗位。
With US natural-gas prices down to just over $4 per million BTU (from $13 just a few years ago), even prudent analysts expect the shale-energy revolution to increase America’s potential economic growth and add as many as two million new jobs.