Mackie’s, which produces ten million litres of ice cream a year, is set to install a biomass technology freezer at its family farm in Aberdeenshire, in a move designed to cut both costs and carbon emissions for the Scottish firm. The new refrigeration system has been built to run on ammonia produced using hot water from a large biomass boiler on site. They hope to cut CO2 emissions by up to 80 per cent and drive down its energy costs by as much as 70-80 per cent once the new freezer is fully installed.