Start with the delineation of equipment related to greenhouse gas emissions, which may be equipment directly controlled/owned by the enterprise and used in the production process (scope 1), or equipment that uses outsourced electricity, heat, etc. (scope 2). The most common greenhouse gases are 1) fossil fuels (coal, natural gas, gasoline and diesel), you can prepare a consumption table; 2) Annual purchased electricity statistics table; 3) Fuel consumption statistics of production vehicles and official vehicles, cantons, etc.