The purpose of this study is to evaluate domestic wastes management policy scenarios for reduction of CO₂ emissions in the Tokyo 23 wards area. The simple model of domestic wastes management system in this area were constructed, and CO₂ emission from the system were estimated. Using this model, the policy scenarios including low emission vehicles, RDF (Refuse Derived Fuel) and disposer system, were evaluated. Among these three policy options, disposer system has much effects for its reduction because of high recovery rate of carbon sources in waste incineration plants and in sewage treatment plants. Installing this system to all over the area, it brings about 1.8% reduction of total CO₂ emission of the Tokyo Metropolitan Area. Introducing low emission vehicles for garbage trucks has positive, but small impact for its reduction. Clear positive impact was not seen in the scenarios of RDF systems.