窒息

为了提高气体的容量或质量，许多类型的气体都是加压运输的。万一发生泄漏，由于气体与大气压相等，它所占的体积将比运输时所用的罐大得多。这可能导致火车周围的氧气错位，可能导致附近的人和动物窒息.这称为窒息。

In order to transport gasses in as big an amount as possible, many are transported pressurized. In case of a leak, as the gas is equalized with atmospheric pressure, it will take much greater volume than the tank it was transported in. This can cause dislocation of air around the train, potentially leading to suffocation of people and animals in its vicinity.

除了危险之外，窒息性气体也有积极的一面。万一发生泄漏事故，因为它们会从一个区域去除氧气，所以它们可以帮助灭火。