# Why doesn't the carbon dioxide produced by a fire put out said fire?

Carbon dioxide ($\ce{CO2}$) is used in some fire extinguishers to put out fire, but a combustion reaction itself produces $\ce{CO2}$. Why do we get fire then?

$$\ce{CH4 + O2 -> CO2 + H2O}$$

Why doesn't this $\ce{CO2}$ put out the fire?

• It does. $\mathstrut$ – Ivan Neretin May 26 '18 at 19:06