First of all, you need to understand the negative effects of oxygen! Oxygen is an indispensable gas for human survival. Without oxygen, humans can asphyxiate in a few minutes. It is unknown that the d...

Chlorine is a toxic gas with a yellowish-green color and a strong irritating odor. It can cause sneezing, coughing, tearing, asphyxia and other symptoms. It mainly invades the human body through the r...