https://www.theguardian.com/sustainable-business/alternatives-salt-battling-ice-cheese-beets-ash The alternatives to salt for battling ice: cheese, beets and ash] Additionally, mixing common rock salt with some of the organic compounds and magnesium chloride results in spreadable materials that are both effective to much colder temperatures ( -34.0 °C ) as well as at lower overall rates of spreading per unit area.