Mr. Howarth included methane losses associated with flow-back and drill-out processes in hydraulic fracturing and other unconventional gas drilling techniques.
霍沃斯先生将在水力压裂法和其它非传统天然气开采技术中返排和钻出过程中所泄露的甲烷包含在了其计算中。
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Mantle material can sink at a plate boundary, and then flowback upward farther away, pushing on the crust - a process called small scale convection.