Even the much-heralded shale-gas revolution is a lot of hype –&#160;similar to the gold rushes and stock bubbles of the past. Shale-gas wells deplete far more rapidly than conventional fields do.
即使最近大热的页岩气革命，也是幻想多于实际——一如过去的黄金热和股市泡沫。页岩气矿的耗竭速度远远快于传统矿，且对环境影响很大。