毒气之王芥子气，曾杀害上百万人，中毒后身体糜烂无药可救6

The passage discusses the use of芥子气 by Japan during WWII， its devastating effects on Chinese civilians， and the ongoing challenge of unexploded chemical weapons in China， causing accidents and health issues for residents. Despite efforts to remove these hazards， many still remain buried or pose a threat.