For activity, manual emissions can be added as substances. The unit of measure (UOM) for substances must be in kilograms (kg) or kilogram CO2 equivalent (kgCO2e) to include them in project emissions calculations. The GWP 100 (Global Warming Potential over 100 years) value must be specified on the Substance page, as it will be used as the CO2 equivalent factor to calculate CO2 emission values. Level adjustments can be made to existing substances, as adding them again is not permitted.
Emission values will be updated at the activity level. And will be rolled up to sub project and project levels.