Lexicon
The basis of combustion is this combustion triangle, which combines the following elements:
• heat
• oxygen
• combustible substance
The fire is extinguished if one of the three causes of the fire is removed. If the combustible material is removed, further spread of the fire through the material is prevented. If we prevent access of oxygen to a combustible substance, we destroy the relationship between the substance and the oxygen that only this needs for burning. If we extinguish by cooling, we lower the temperature below the ignition point of the burning substance