Nowadays, says Tom Ellacott of Wood Mackenzie, an energy-advisory firm, American shale is less carbon-intensive than conventional fields, as well as quicker and cheaper to develop.

能源咨询公司 Wood Mackenzie 的汤姆·埃拉科特 (Tom Ellacott) 表示， 如今，美国页岩油的碳密集度低于传统油田，而且开发速度更快、成本更低。