Asphyxiating/zh-hant

窒息性物質是危險物品 的一種，一旦發生洩漏 ，將導致暫時性地缺氧。

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.

撇除危險性，窒息性氣體也能帶來助益。萬一發生洩漏事故，由於它們能將區域內的氧氣排除，它們能夠幫助滅火。