The US is estimated to have enough gas to sustain its current rate of production for more than a century. While many other countries also have considerable shale-gas potential, problems abound, including water scarcity in China, investment security in Argentina, and environmental restrictions in several European countries.
据估计，美国的天然气足够以当前产量开采一百年。其他国家也拥有相当可观的页岩气储量，但问题重重，比如中国存在水资源短缺问题，阿根廷存在投资安全性问题，欧洲国家存在环境约束问题，等等。