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acid air pollution Air Pollution Control Alkali Inspectorate appliances atmospheric pollution authorities black area boiler Brighton British burner burning carbon monoxide cars cent Chairman chemical chimney City Clean Air Act coal combustion Committee concentrations Conference cost Council diesel Division dust East Midlands economic effects efficiency effluent electric emissions engines environment environmental equipment exhaust filter fire flue fume furnace gases Government heating incinerator increase industry installed International lead measures meeting ment metal Midlands million monitoring National Coal Board National Society natural gas noise North operation organisations oxides paper particles petrol plant power stations present problems production programme Public Health Inspectors Reader Enquiry Service reduce Research Road Rolfite smoke control areas SMOKE CONTROL ORDERS smokeless fuel Society for Clean solid fuel Solid Smokeless Fuels steel Street sulphur dioxide Teesside temperature tion tonnes United vehicles waste