The Global Protocol for Community-Scale Greenhouse Gas Emissions (GPC) is a multi-stakeholder, consensus-based protocol for developing internationally recognized and accepted community-scale greenhouse gas accounting and reporting standards. It is the result of a year-long collaboration between ICLEI – Local Governments for Sustainability and C40 Cities Climate Leadership Group; on 1 June 2011, the two organizations forged an agreement to develop a standard approach for accounting and reporting GHG emissions that will boost cities’ ability to access funding and implement actions.