Criteria for aggregation of emission sources
        GAINS applies five criteria:
        •      Importance of a source (>0.5 percent in a country)
        •      Possibility for using uniform activity rates and emission factors
        •      Possibility of establishing plausible forecasts of future activity levels 
        •      Availability and applicability of “similar” control technologies 
        •      Availability of relevant data 
                                Macroeconomic parameters
                 Population
                 GDP (in MEX and in PPP
                 Value added by major sector:
                 •  Industry
                 •  Agriculture
                 •  Transport 
                 •  Other services
                 Major sectors divided into sub-sectors (e.g., industrial 
                 branches like Iron and Steel, Chemicals, Mineral Products 
                 etc.) 
                 All macro values in constant prices (currently €2005)
                    Aggregation of energy- related sources
            Fuel categories:                          Primary sectors:
            •   Coal                                  •   Power plants
            •   Oil                                   •   Other energy production and 
            •   Gas                                       conversion
            •   Biomass                               •   Industry
            •   Renewables                            •   Domestic
            •   Nuclear                               •   Transport
            •   Electricity                           •   Non-energy use
            •   Heat                                  Further divided into secondary 
            •   Different types and grades            sectors
                included
                            Aggregation of transport sources
                •   Road transport
                     – Cars, light-duty trucks
                     – Heavy-duty trucks, buses
                     – Motorcycles and mopeds (2-stroke, 4-stroke)
                •   Non-road mobile sources
                     – Rail, Air, Inland waterways
                     – National sea traffic and national fishing
                     – Mobile machines – construction and industry, agriculture
                     – Other (households, gardening, forestry, military)
                •   For each source vehicle numbers and fuel consumption assessed. For 
                    road transport – also vehicle-kilometers
                         Aggregation of process sources
         Production of raw materials:              Storage and handling of bulk products:
         •   Steel                                 •  Coal
         •   Aluminum                              •  Agricultural products
         •   Other metals                          •  Metal ores
         •   Cement                                •  Fertilizers
         •   Glass                                 •  Other…
         •   Oil refining                          Construction activities
         •   Fertilizers…                          Waste treatment and disposal