Dry powder fire extinguishers contain heavy metal substances (arsenic, cadmium), which are not only harmful to the air, but also extend to our daily lives through rivers and groundwater discharge.

Arsenic is a chronic toxic substance. When it exists in groundwater in excess, it not only makes the groundwater undrinkable, but also has a negative impact on the environment and ecology. Arsenic can enter the human body and accumulate through inhalation, ingestion, and absorption through the skin. If excessive arsenic compounds cannot be excreted from the body through metabolism and accumulate in the organism, it will cause harm to the organism...