By happy coincidence, many of the most promising shale-gas deposits in Europe are in those countries most vexed by their dependence on imports of Russian gas, such as Poland, Hungary and Ukraine.

• 无巧不巧的是，欧洲许多前景最为光明的页岩天然气储藏地恰恰位于最受俄罗斯天然气进口依赖困扰的国家境内，比如波兰，匈牙利和乌克兰。