_:b670486305 . _:b670486305 . _:b670486305 . _:b670486305 "Combustion or burning is a high-temperature exothermic redox chemical reaction between a fuel and an oxidant that produces oxidized, often gaseous products, in a mixture termed as smoke." . _:b670486305 "https://en.wikipedia.org/wiki/Combustion" . _:b670486305 .