前不久发生在北美地区的大规模“断电事件”,致使成千上万的地铁乘客滞留在地下通道中。但是这种情况在不久的未来将永远不会再发生。因为那时地铁已经完全脱离了电网,采用燃料电池作为动力。位于美国丹佛的“燃料电池动力协会”目前正在试图以燃料电池来取代重达120吨的柴油机 A large-scale “blackout” incident occurred in North America recently, leaving tens of thousands of subway passengers stranded in underground passageways. But this situation will never happen again in the near future. Because the subway was completely out of the grid at that time, fuel cells were used as power. The “Fuel Cell Power Association” in Denver, USA, is currently trying to replace 120-ton diesel engines with fuel cells.