a combustion reaction is a reaction where a substance reacts with oxygen gas
combustion is oxidation. combustion is chemical_process. fire is chemical_reaction. detonating is combustion_reaction. combustion_reaction is chemical_reaction. methane_combustion is not combustion_reaction. combustion_reaction is not burning. methane_combustion is combustion_reaction. combustion_reaction is burning. combustion_reaction is not chemical_reaction.