The buried-pipe laying of steel natural gas line concerns entire urban gas supply system and the safety of people's lives and properties.

钢质天然气管道埋地敷设工程关系到整个城市供气系统和人民生命财产的安全。

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Hydraulic fracturing, or fracking, is under widespread development in the United States, fueling a natural gas supply boom, with an EPA review of its environmental safety underway.

FORBES: European Gas Giant Backs French Fear Of Fracking