The Cornerstone of Climate Action for Cities: What is the GPC Standard and Why is it Vital?

Essential Guide to Urban Climate Action: GPC

While tackling climate change is a global challenge, solutions start at the local level, especially in cities. But to solve a problem, it is first necessary to define and measure it. This is where the GPC Standard, the compass of cities on their climate action journey, comes into play. So, what exactly is the GPC and why is it a strategic imperative for a city to create a greenhouse gas (GHG) inventory?

GPC Standard: A Global and Transparent Framework

The GPC (Global Protocol for Community-Scale Greenhouse Gas Emission Inventories) is a global standard for cities and local governments to identify, calculate and report their greenhouse gas emissions. It is designed not only for large cities but also for all geographically identifiable sub-national entities such as towns, communities and states.

The most important feature of the GPC is that it addresses emissions in a consistent and transparent framework. This framework deepens the analysis by dividing emissions into three main scopes depending on where they occur:

Scope 1 (Regional): Direct emissions from sources such as fuel combustion (e.g. fossil fuel buses) within city boundaries.
Scope 2: Emissions from grid electricity, heat or cooling used within the city boundaries.
Scope 3: Emissions that occur outside the city as a result of activities within the city (e.g. waste disposal).

GPC also provides flexibility by offering two different reporting levels, BASIC (fixed energy, transportation, waste) and BASIC+ (adding industrial processes, agriculture, etc.), depending on the data capacity of the cities.

Why is it Vital? A Strategic Roadmap

Creating a GPC-compliant GHG inventory for a city is not just a technical reporting process, but a vital step in shaping the city's future.

Establishing a Reliable Baseline and Reference Point: In order for a city to reach its "Net Zero" target, it is first necessary to take a snapshot of the current situation. The GPC inventory establishes a reliable "base year" (reference point) for cities to set emission reduction targets and track their performance over time. In this way, progress can be tracked on an evidence-based basis.
Targeted Action Planning (CAP): GPC clearly identifies which sector (buildings, transportation, waste, etc.) emissions come from. This data enables cities to identify prioritized mitigation actions that will have the greatest impact. For example, if the majority of emissions come from transportation, the city government can direct investments towards public transport or electrification. This data analysis forms the basis of Climate Action Planning (CAP).
Access to Climate Finance: International funders and financial institutions want to see the impact of the projects they will invest in with concrete data. Providing reliable emission data in line with GPC standards significantly strengthens cities' access to national and international climate finance.
Global Benchmarking and Harmonization: The GPC has been recognized as a core component of international platforms such as the Global Covenant of Mayors on Climate and Energy (GCoM). A city using this standard can benchmark itself against a similar city on the other side of the world, share information and become an integrated part of the global climate challenge.

As a result, the GPC Standard is the most powerful tool that transforms cities' fight against climate change into "evidence-based strategic decisions" rather than "predictions".