PASIR GUDANG: The Fire and Rescue Department has identified at least 15 types of chemicals in air samples taken from areas surrounding Sungai Kim Kim, including hydrogen cyanide.
Its Johor department director Datuk Yahaya Madis said while most of these gases were harmless, some – such as hydrogen cyanide – could be harmful if found in high concentration or if a person was exposed to it for too long.
