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The red machine on the left is the furnace which burns refuse from Shetland, Orkney and offshore. About 22,000 tons is burnt each year, which means that Shetland puts less than 10% of its waste to landfill. The furnace burns at 1200 degrees Celsius and heats water which is used for the District Heating Scheme in Lerwick, which heats council houses, private homes and major buildings in Lerwick, including the school and the hospital, as well as providing water for Shetland's milk pasteurisation plant.