GHGProof: Open-Source Climate Modelling for Land-Use Planning

Overview

GHGProof is an open-source software model designed to evaluate the impacts of land-use decisions on greenhouse gas emissions and energy consumption at the community scale. Developed by the Sustainability Solutions Group, a Canadian workers' co-operative, the tool provides a structured framework for analyzing how urban planning choices influence environmental outcomes. The model has been widely used in British Columbia since its commissioning in 2008, serving as a key resource for municipalities and planners seeking to quantify the carbon footprint of local development patterns. Regular revisions and updates are maintained through the Sustainability Solutions Group's dedicated GHGProof pages, ensuring the model remains current with evolving data and methodological improvements.

The primary function of GHGProof is to link land-use variables with energy consumption and emission outputs. By focusing on the community scale, the model allows for granular analysis of how factors such as density, transit accessibility, and building types contribute to overall greenhouse gas profiles. This approach supports evidence-based decision-making in urban planning, enabling stakeholders to compare different development scenarios and their respective environmental impacts. The open-source nature of the software facilitates transparency and adaptability, allowing users to modify parameters to suit specific local contexts.

Since its introduction, GHGProof has become an established tool in British Columbia's planning landscape. Its widespread adoption reflects the region's emphasis on integrating climate considerations into land-use policy. The Sustainability Solutions Group continues to support the model through ongoing updates, which are documented on their official resources. Reviews and comparisons with other modelling platforms are available in referenced literature, providing further insight into the model's strengths and applications within the broader field of urban sustainability analysis.

History and Development

GHGProof was developed by the Sustainability Solutions Group, a Canadian workers’ co-operative, and has been operational since its commissioning in 2008 (Sustainability Solutions Group). The software is an open-source model designed to evaluate the impacts of land-use decisions on greenhouse gas emissions and energy consumption at the community scale. Its development trajectory is rooted in practical application, having been widely used in British Columbia since 2008, with regular revisions and updates managed through SSG's GHGProof pages.

Origins and Early Pilots

The origins of the GHGProof model are tied to specific regional planning needs in Canada. Development began with the Salt Spring Island project, which served as a foundational case study for the software’s capabilities. This initial phase was supported by a grant from the Canada Mortgage and Housing Corporation (CMHC), providing the financial and institutional backing necessary to refine the model’s parameters for community-scale analysis.

Following the Salt Spring Island initiative, the model underwent further testing and refinement through pilot programs with municipalities in the Fraser Valley Regional District (FVRD). These pilot programs allowed developers to stress-test the model against diverse municipal data sets, ensuring its robustness for broader application across British Columbia. The iterative process involved regular updates to the software, reflecting feedback from these early adopters and enhancing the model’s utility for local government planners.

Development Timeline

The model’s open-source nature has facilitated its continuous evolution. Regular revisions are published on SSG's GHGProof pages, ensuring that users have access to the latest iterations of the software. Reviews of GHGProof and comparisons to other modelling platforms are available in the references, highlighting its position within the broader landscape of energy and land-use modelling tools. The software remains a key resource for evaluating the environmental impact of community planning decisions in Canada.

What emissions sources does GHGProof cover?

GHGProof evaluates greenhouse gas emissions and energy consumption across five primary sectors: transportation, buildings, agriculture, waste, and forest practices. The model operates at the community scale, allowing planners to assess how specific land-use decisions influence overall emission profiles. Developed by the Sustainability Solutions Group, the software provides a structured framework for comparing different development scenarios. The system integrates data from these diverse sources to produce a comprehensive view of a community’s carbon footprint. This multi-sector approach ensures that interactions between different emission sources are captured, rather than analyzing each sector in isolation.

Transportation

The transportation sector is a major component of the model. GHGProof calculates emissions based on vehicle kilometers traveled, fuel types, and vehicle efficiency. The model accounts for both private and public transportation modes. Changes in land-use density and proximity to transit hubs directly affect transportation emissions in the model’s output. This allows planners to quantify the climate benefits of compact urban designs.

Buildings

Building-related emissions include energy used for heating, cooling, lighting, and appliances. The model distinguishes between residential and commercial building stocks. Energy consumption is calculated based on building age, insulation standards, and local climate conditions. GHGProof also considers the source of energy, such as electricity from the grid or direct natural gas usage. This sector is critical for understanding the impact of building codes and retrofitting programs.

Agriculture

Agricultural emissions are derived from land-use changes and farming practices. The model accounts for methane emissions from livestock and nitrous oxide from fertilizer application. It also considers carbon sequestration in agricultural soils. The specific mix of crops and pastureland influences the overall agricultural emission profile. This sector is particularly relevant for communities with significant rural or peri-urban agricultural zones.

Waste

The waste sector includes emissions from solid waste disposal, wastewater treatment, and water supply. GHGProof calculates methane emissions from landfills and aerobic decomposition. It also accounts for the energy required to treat wastewater and pump water. Recycling rates and waste-to-energy projects can significantly reduce emissions in this category. The model allows for detailed input on waste composition and management strategies.

Forest Practices

Forest practices involve carbon sequestration and emissions from forestry activities. The model tracks carbon stocks in trees, soils, and dead organic matter. Deforestation and afforestation projects are evaluated for their net carbon impact. GHGProof considers the age structure of forests and the type of vegetation. This sector is crucial for communities with significant forested areas, as forests can act as major carbon sinks or sources depending on management practices.

Applications in Municipal Planning

GHGProof serves as a critical analytical tool for municipal planning authorities seeking to quantify the environmental footprint of urban development. The software enables planners to evaluate the impacts of specific land-use decisions on greenhouse gas emissions and energy consumption at the community scale. This capability is essential for developing robust GHG targets that align with broader regional climate goals. By providing a standardized method for assessment, the model supports evidence-based policy making in urban environments.

Evaluating Development Proposals

Municipalities utilize GHGProof to assess individual development proposals before finalizing zoning approvals. The open-source model allows planners to input specific parameters regarding land density, transportation networks, and building types to project emission outcomes. This process helps identify high-impact projects that may require mitigation strategies. The software’s design facilitates the comparison of different development scenarios, ensuring that new constructions contribute effectively to local energy efficiency goals. Since its commissioning in 2008, this functionality has become a standard part of the planning workflow in many jurisdictions.

Scenario Planning and BC Government Incentives

Scenario planning is a primary use case for GHGProof, allowing cities to model long-term growth patterns. Planners can simulate various land-use configurations to determine their effect on future emissions. The model has been widely used in British Columbia since 2008, where it has informed regional growth strategies. The British Columbia government has provided incentives for municipalities to adopt the tool, recognizing its value in standardizing emissions reporting. These incentives have encouraged broader adoption across the province, fostering a consistent approach to climate action planning. Regular revisions and updates from Sustainability Solutions Group ensure the model remains relevant to evolving planning needs.

Adoption Across British Columbia

The operational deployment of GHGProof has been concentrated primarily within the province of British Columbia, Canada. Since its initial commissioning in 2008, the software has served as a critical analytical tool for local governments seeking to quantify the environmental impact of urban planning and land-use strategies. Developed by the Sustainability Solutions Group, a Canadian workers' co-operative, the model was designed to bridge the gap between municipal zoning decisions and provincial greenhouse gas reduction targets. The widespread adoption across the region reflects the need for a standardized, open-source methodology that allows for consistent comparison of emissions data across different community scales.

Municipal Implementations

Numerous municipalities and regional districts in British Columbia have integrated GHGProof into their official climate action plans and official community plans. The model is utilized to evaluate the carbon footprint of residential density, transportation networks, and commercial land allocation. The following table lists key jurisdictions that have employed GHGProof for their strategic energy and emissions assessments, as documented in regional planning reviews and Sustainability Solutions Group updates.

The adoption of GHGProof in these jurisdictions enables planners to simulate various future scenarios, such as increased housing density or expanded public transit routes, and predict their respective effects on total community emissions. This capability supports evidence-based policy-making, allowing local governments to align their development strategies with broader provincial climate goals. The open-source nature of the model facilitates transparency and allows for peer review and continuous improvement through regular updates provided by the Sustainability Solutions Group.

Licensing and Open Source Status

GHGProof operates under an open-source licensing framework that distinguishes it from proprietary energy and land-use modelling platforms. The software is released under the Creative Commons Attribution-NonCommercial-ShareAlike 3.0 Unported License (CC BY-NC-SA 3.0). This specific license structure was selected by the Sustainability Solutions Group to balance the need for widespread accessibility with the preservation of the tool’s utility for community-scale planning. The open-source nature of the model allows planners, researchers, and municipal officials to inspect the underlying logic, verify assumptions, and adapt the software to local contexts without being locked into a single vendor’s ecosystem.

License Implications for Community Engagement

The CC BY-NC-SA 3.0 license imposes three primary conditions that directly influence how the software is deployed in public and private sectors. First, the Attribution (BY) clause requires users to credit the Sustainability Solutions Group as the original developer. This ensures that the intellectual labor of the Canadian workers’ co-operative remains visible as the model is adopted across different jurisdictions, particularly in British Columbia where the tool has seen extensive use since 2008.

Second, the NonCommercial (NC) clause restricts the use of the software for strictly commercial purposes without explicit permission. This provision is critical for maintaining the tool’s focus on public good and community planning. It prevents large commercial consulting firms from reselling the core model as a proprietary product without contributing back to the open-source community or securing a commercial license. This structure encourages municipal governments and non-profit organizations to adopt the tool for local greenhouse gas and energy consumption evaluations, fostering a more equitable distribution of planning resources.

Third, the ShareAlike (SA) clause mandates that any derivative works or adaptations of GHGProof must be licensed under the same CC BY-NC-SA 3.0 terms. This creates a "copyleft" effect, ensuring that improvements, bug fixes, and new features developed by users are fed back into the common pool. For community engagement, this means that a municipality in one region that enhances the model’s land-use parameters can share those updates with other communities, creating a collaborative ecosystem of continuous improvement. This aligns with the Sustainability Solutions Group’s mission to provide transparent, adaptable tools for evaluating the impacts of land-use decisions on greenhouse gas emissions and energy consumption.

The combination of these license terms supports a model of participatory planning. By removing cost barriers for non-commercial entities and ensuring transparency through open-source code, GHGProof enables communities to engage more deeply with the technical aspects of their energy and land-use strategies. The regular revisions and updates provided by the Sustainability Solutions Group further reinforce this collaborative approach, allowing the model to evolve in response to user feedback and changing environmental data.

Significance

GHGProof addresses a critical gap in municipal climate planning by providing a standardized, open-source framework for evaluating greenhouse gas emissions at the community scale. Unlike proprietary software suites or national-scale macro-models, GHGProof is specifically designed to empower local governments with accessible tools to measure and manage their environmental impact. Developed by the Sustainability Solutions Group, a Canadian workers’ co-operative, the model has been operational since 2008, offering a consistent methodology for tracking emissions and energy consumption across diverse jurisdictions. This standardization is particularly significant for regions like British Columbia, where the tool has been widely adopted to help municipalities align their land-use decisions with provincial greenhouse gas targets.

Open-Source Accessibility and Standardization

The open-source nature of GHGProof distinguishes it from many competing energy and emissions modeling platforms. By removing proprietary barriers, the software allows for greater transparency and adaptability, enabling local planners to customize inputs without being locked into expensive licensing structures. This accessibility ensures that communities of varying sizes and budgetary constraints can utilize a robust analytical tool. The model’s focus on land-use decisions provides a direct link between urban planning choices and their resulting carbon footprint, allowing policymakers to simulate the environmental outcomes of zoning changes, density adjustments, and infrastructure development.

Alignment with Provincial Targets

In the context of British Columbia, GHGProof serves as a vital instrument for meeting provincial climate goals. Local governments face increasing pressure to quantify and reduce their emissions, and GHGProof offers a validated method for doing so. The tool’s regular revisions and updates, maintained by the Sustainability Solutions Group, ensure that the model remains relevant as new data and methodologies emerge. This continuous improvement process supports long-term planning efforts, allowing municipalities to track progress over time and adjust strategies to meet evolving targets. The widespread use of GHGProof in the province underscores its reliability and effectiveness as a decision-support system for local climate action.

See also

• Robert-Bourassa generating station
• Boundary Dam Power Station: Coal, Carbon Capture and Economic Controversy
• Churchill Falls Generating Station: Engineering, Contract Disputes and Regional Impact
• Quest Carbon Capture and Storage Project
• IPCC Sixth Assessment Report: Structure and scope