A method for reducing pollutant emissions from a metal casting case used in foundry practice. The metal casting case includes at least a molding material formed to a metal casting mold. The pollutant emissions are released from material making up the casting cases after pouring molten metal in the metal casting mold. The method includes the steps of adding at least one additional combustible substance to at least one region of the casting mold located outside of a contact region of the casting mold with the casting, and burning the at least one additional combustible substance in one of a gaseous and vaporized state together with the pollutant emissions.