This research aimed to study the physical composition of solid waste and to study of carbon dioxide gas (CO2) emission from solid waste disposal of chanuwan subdistrict phanom phrai district roi et province. By using waste generation data in the year 2022 to calculate the amount of greenhouse gas emissions using the greenhouse gas emission coefficient. The evaluation of carbon dioxide emission was calculated from emission factors (EF) in term of CO2 equivalent according to the guidelines of The Intergovernmental Panel on Climate Change (IPCC) and Thailand Greenhouse Gas Management Organization (Public Organization) (TGO). The results showed that the proportion of food waste was the highest amount, accounting for 32.23%, followed by plastic bag waste, accounting for 13.35%, and the lowest amount of solid waste was foam, accounting for 2.13%.The total carbon dioxide emission from solid waste disposal throughout the year was 1837.89 kgCO2eq/year. 226.74 kgCO2eq/year, and the least CO2 emitting solid waste is foam, which is 17.24 kgCO2eq/year.