The updated Global Protocol for Community-Scale Greenhouse Gas Inventories 1.1 (GPC 1.1) offers cities and local governments a robust, transparent, and globally accepted framework to consistently identify, calculate, and report on city greenhouse gas emissions. This version is an update to the original Global Protocol for Community-Scale Greenhouse Gas Emission Inventories  published in 2014. GPC 1.1 has been revised to align with the 2019 Refinement to the 2006 IPCC Guidelines for National Greenhouse Gas Inventories, to clarify ambiguities, and to provide further methodological guidance. Table 1.2 in GPC 1.1 provides a comprehensive list of the updates made to the GPC 2014 version.

This standard was developed by World Resources Institute (WRI), C40 Cities Climate Leadership Group (C40), and ICLEI—Local Governments for Sustainability (ICLEI). You can find the updated version here.