C arbon emissions from land use and land-use change 122 6. Global Protocol for Community-Scale Greenhouse Gas Emission Inventories Foreword Cities are integral to tackling the global challenge of The GPC has already been adopted as a central component climate change, as both a major source of greenhouse of the Compact of Mayors, the world’s largest cooperative gas emissions, and a major source of [...] The GPC cities with existing climate action plans and targets, the does not require specific methodologies to be used to mitigation goal boundary used will be different to the produce emissions data; rather it specifies the principles inventory boundary outlined above or will apply to a subset and rules for compiling a city-wide GHG emissions of the GHGs, scopes, or emission sources set out in the [...] Cities may choose to government departments and statistics agencies, a country’s verify their data to demonstrate that their calculations national GHG inventory report, universities and research are in accordance with the requirements of the GPC institutes, scientific and technical articles in environmental and provide confidence to users that the reported GHG books, journals and reports, and sect [...] Verification available activity data do not align with the geographical can be performed by the same organization that boundary of the city or the time period of the assessment, conducted the GPC assessment (self-verification), or by the data can be adapted to meet the inventory boundary an independent organization (third-party verification). [...] The wri and GHG Protocol is a partnership of businesses, non-governmental organizations, governments, and the ghg Protocol others convened by WRI and the World Business Council for Sustainable Development to develop internationally-accepted GHG accounting and reporting standards and tools.