When ammonium carbonate decomposes what gas is produced and will a glowing splint burn brighter in the presence?

When ammonium carbonate is heated it decomposes to give ammonia gas, carbon dioxide gas and water. The equation for the decomposition is;

(NH4) 2CO3 (s) = 2 NH3 (g) + CO2 (g) + H2O (l)

A glowing splint would extinguish almost immediately because of the presence of carbon dioxide. Carbon dioxide does not support burning which is the property that makes it used a s a fighter extinguisher.