- Boundary setting and reporting levels: The GHG Protocol ‘scopes’ framework has been adapted to suit the needs of a city-level inventory and help clarify boundaries for emission sources and reporting. Multiple reporting levels (BASIC and BASIC+) accommodate city differences in technical capacity and data availability.
- Elaboration of calculation methods and procedures by sector: This includes new guidance on data collection and GHG emissions calculation.
- Comparison with IPCC national inventory practices and other city guidance documents: For cities that have followed other inventory approaches in the past, including adapting national inventory practices to a city, the GPC draft 2.0 shows how these different frameworks align with the GPC and to translate these into a GPC-compliant report.
- Clarification on inventory aggregation: Increasingly, city GHG data is shared with national governments and informs national initiatives. The GPC draft identifies how multiple cities’ inventory data can be rolled up or aggregated at the national level while avoiding double counting.
- Guidance on setting goals and tracking emissions over time: The GPC draft 2.0 follows international best practices, including those in the emerging GHG Protocol Mitigation Goals Standard, in elaborating how cities can set different types of GHG reduction goals and measure progress consistently as cities change in administrative boundaries or adopt better data and methodologies.
Besides the pilot test, the GPC authors convened three meetings to seek comments and inputs of the GPC advisory committee, a group consisting of experts from 29 organizations around the world. As part of the inclusive stakeholder process, the authors also convened a broader group of city representatives, technical experts, and other stakeholders from different parts of the world in Beijing, Sao Paulo, London, Dar es Salaam, New Delhi, and Jakarta to seek their inputs and share good practices.