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In 2008, we used 21.7 million tons (dry basis) of raw materials for cement production. Approximately 6.8% of all raw materials (about 1.5 million tons - dry basis) were alternative raw materials, namely by-products and waste disposal from other industries such as pyrite ash, blast furnace slag and industrial gypsum. Compared to 2007, consumption of alternative raw materials, as a total quantity, did not change. The remaining 20.2 million tons (dry basis) were natural materials from mining and quarrying activities.