Does carbon dioxide support combustion? Where is this property of carbon dioxide used?

Does carbon dioxide support combustion? Where is this property of carbon dioxide used? How can you distinguish between two glasses: filled with air and filled with carbon dioxide?

Carbon dioxide does not support combustion. The use of carbon dioxide in fire extinguishers is based on this property. A burning splinter can be used to distinguish between glasses filled with air and carbon dioxide. In a glass of air it will burn, and in a glass of carbon dioxide it will go out.

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