Global Protocol for Community-Scale Greenhouse Gas Emissions Inventories

Global Protocol for Community-Scale Greenhouse Gas Emissions Inventories
Name	Global Protocol for Community-Scale Greenhouse Gas Emissions Inventories
Abbreviation	GPC
Established	2014 (consolidated)
Developer	World Resources Institute; C40 Cities; ICLEI—Local Governments for Sustainability
Type	Accounting standard
Scope	Cities; municipalities; local authorities

Global Protocol for Community-Scale Greenhouse Gas Emissions Inventories. The Global Protocol for Community-Scale Greenhouse Gas Emissions Inventories is a standardized accounting framework created to enable New York City, London, Beijing, Cape Town and other subnational jurisdictions such as São Paulo and Tokyo to quantify greenhouse gas emissions consistently. Developed through a partnership of World Resources Institute, C40 Cities Climate Leadership Group, and ICLEI—Local Governments for Sustainability, the Protocol aligns with international instruments such as the United Nations Framework Convention on Climate Change and supports commitments under the Paris Agreement and initiatives by organizations like the World Bank and the European Commission.

Overview

The Protocol establishes a city-scale inventory methodology influenced by the Greenhouse Gas Protocol and by international standards used by Intergovernmental Panel on Climate Change reports, enabling comparability among jurisdictions including Los Angeles, Paris, Mexico City, Mumbai, and Sydney. It defines operational boundaries and scopes to reconcile inventories prepared by municipal administrations, metropolitan planning organizations, and regional bodies such as the African Union, ASEAN, and the Organization of American States. By providing guidance on sector definitions, emissions calculation, and reporting formats, the Protocol supports policy alignment with national strategies like those submitted to the United Nations and assists participation in networks such as ICLEI, C40, and Global Covenant of Mayors for Climate & Energy.

Scope and Objectives

The Protocol's objectives emphasize consistent accounting to enable Barcelona, Toronto, Amsterdam, Singapore, and Hong Kong to track progress against mitigation targets, prioritize actions, and attract finance from institutions like the Green Climate Fund, Asian Development Bank, and European Investment Bank. It sets out to cover territorial emissions and consumption-based approaches to integrate activities across transport systems managed by authorities including Transport for London and agencies in Seoul or Zurich. The scope includes direct emissions from stationary energy, mobile combustion, and fugitive sources, and indirect emissions from purchased electricity and embodied sources implicated in trade with regions such as California and Bavaria.

Methodology and Accounting Framework

The accounting framework categorizes emissions into Scopes 1–3, building on precedents set by the Greenhouse Gas Protocol corporate standards and integrating sectoral approaches used by the International Energy Agency and methodologies cited in IPCC guidelines. It prescribes territorial and consumption-based inventory options similar to life-cycle assessment practices employed in studies by Massachusetts Institute of Technology, Stanford University, and University College London. The framework provides procedures for time-series consistency, emissions allocation across administrative boundaries like those of Greater London Authority and New York State, and guidance on handling biogenic sources as in protocols applied by the Food and Agriculture Organization.

Data Sources and Emission Factors

Inventories rely on activity data from utilities such as EDF, Pacific Gas and Electric Company, and municipal water providers, transportation datasets from agencies like Metropolitan Transportation Authority (New York) and RATP Group, and land-use records derived from cadastres used by National Aeronautics and Space Administration remote sensing and European Space Agency products. Emission factors are drawn from compilations by the Intergovernmental Panel on Climate Change, national inventories such as those submitted to the UNFCCC, and region-specific factors published by agencies including U.S. Environmental Protection Agency, Environment and Climate Change Canada, and Japan Meteorological Agency.

Sectoral and Source Categories

The Protocol divides emissions into sectors commonly referenced in urban climate planning: stationary energy for buildings and industry as seen in regulations in Berlin and Vienna; transportation including on-road, aviation, and marine consistent with datasets from International Civil Aviation Organization and International Maritime Organization; waste management reflecting practices in Copenhagen and Singapore; and land-use, land-use change, and forestry aligning with REDD+ frameworks. It also accounts for industrial process emissions associated with facilities regulated by authorities like the Environmental Protection Agency (United States) and energy production at utilities such as E.ON.

Implementation and Capacity Building

Implementation guidance targets municipal staff in administrations like New York City Department of City Planning, Greater London Authority, and agencies within São Paulo and Buenos Aires, recommending training collaborations with academic institutions including University of California, Berkeley and Tsinghua University. Capacity-building programs have been delivered through partnerships with development banks and networks such as ICLEI, C40, UN-Habitat, and donor programs managed by the United Nations Development Programme.

Reporting, Verification, and Transparency

The Protocol promotes transparent reporting formats compatible with registries and platforms used by Global Covenant of Mayors, Carbon Disclosure Project, and national communications to the UNFCCC. Verification practices draw on third-party assurance models applied by firms like PricewaterhouseCoopers, Deloitte, and KPMG and on academic peer review from centers such as Grantham Research Institute and Energy Policy Research Group.

Limitations and Criticisms

Criticisms include challenges in attributing emissions across overlapping jurisdictions such as metropolitan regions involving Los Angeles County and adjacent municipalities, debates over territorial versus consumption-based accounting echoed in analyses by OECD and World Bank, and data gaps in cities across the Global South including many in Sub-Saharan Africa. Observers from think tanks like Brookings Institution and Chatham House note uncertainties from coarse emission factors, boundary setting issues familiar to scholars at Harvard Kennedy School, and the need for integration with equity-focused frameworks advocated by organizations such as Climate Action Network and Oxfam.

Category:Greenhouse gas inventory standards