The harm of carbon dioxide to human body is mainly to stimulate people's respiratory center, leading to shortness of breath, increased smoke inhalation, headache, unconsciousness and other symptoms. Carbon dioxide itself is not toxic, but when the carbon dioxide in the air exceeds the normal content, it will have harmful effects on the human body. So in crowded places, we should pay attention to ventilation. Before entering some places that may contain carbon dioxide gas, it is necessary to detect the content of carbon dioxide there to see if it will threaten people's health.
The following table shows the influence of CO2 content in the air on human body.
The content of CO2 in the air/%symptom
2.5 There are no symptoms after several hours.
3.0 unconsciously increase the number of breaths
4.0 Local irritation symptoms appear
6.0 increase breathing ability
8.0 Dyspnea
10.0 was unconscious and died soon.
After 20.0 seconds, he was paralyzed and his heart stopped beating.