When liquefied petroleum or natural gas is not completely burnt, smell-less and color-less carbon monoxide will be produced. The combination of carbon monoxide with red blood cell is much more powerful than the combination of oxygen with red blood cell. Therefore, when overly inhaled, people will unconsciously fall into coma and fail to move. People will die in a few minutes without timely rescue.
Causes of carbon monoxide toxication are mostly improper installation of the gas heater, cooking in poorly ventilated places, burning wood in poorly ventilated room for warming, staying in a closed automobile of prolonged ignition. The following precautions should be taken:
1. Gas and heater must be installed in places with good ventilation.
2. Never burn wood or coal indoor for warming; good ventilation should be ensured.
3. Automobile should not be ignited for long time in poorly ventilated basement or
closed garage.