The document has been prepared to summarize current information on sources of carbon monoxide (CO) emissions, methods of control, and costs and cost-effectiveness of controls. The control techniques described herein represent a broad spectrum of information from many engineering and other technical fields. The devices, methods, and principles have been developed and used over many years, and much experience has been gained in their application. They are recommended as the techniques generally applicable to the broad range of CO emission control problems. Many agricultural, commercial, industrial, and municipal processes and activities that generate CO are described individually in this document. Various techniques that can be applied to control emissions of CO from these sources are reviewed and compared, and equipment costs are included, also. Although exhaust from automobiles constitutes by far the greatest source of CO in the atmosphere, this emission category is not discussed comprehensively in this document. (Author)