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Environmental and emissions data are reviewed against recognized verification standards. These standards set out the principles and methods a verifier uses to assess whether reported information is complete, accurate, and reliable. Different standards allow for different levels of assurance, which determines how detailed the verification process will be and how deeply the verifier reviews the data for errors, omissions, or misstatements.
There are two commonly accepted levels of assurance: reasonable assurance and limited assurance. Reasonable assurance provides a high level of confidence that the emissions data is materially accurate and free from significant errors. Limited assurance provides a lower level of confidence and involves a more limited review of greenhouse gas data and supporting records. Under limited assurance, the verifier confirms that there is no evidence suggesting the emissions report contains material misstatements.
The primary verification standard applied by our verifiers is ISO 140064-3. This standard, developed by the International Organization for Standardization, is specifically designed for greenhouse gas inventories and supports reasonable assurance engagements. Other commonly used standards include those issued by the GHG Protocol, The Climate Registry, and the International Standards on Assurance Engagements (ISAE).
Organizations select a verification standard based on their reporting objectives, regulatory requirements, stakeholder expectations, and the level of assurance they wish to achieve.
Climate change has made the reduction of greenhouse gas emissions one of the most critical ESG priorities today. Governments, customers, and investors increasingly expect organizations to measure and lower their emissions. Achieving this begins with collecting accurate information on where emissions come from and what types are generated. Independent verification confirms the reliability of this data and enables organizations to plan and implement emission reductions in a credible, efficient, and effective manner.
Initiating a Net-Zero Emissions Strategy: A Case Study of an Electric Utility Company
Electricity is a key source of energy in Ghana, with consumption growing almost every year since the 1950s. With peak electricity consumption in Ghana measured at 4,000 MGW, and as the impacts of climate change become top of mind for many consumers, demand for renewable energy sources increases. In 2021, a Ghana-based thermal power generation company began its initial transition toward decarbonization by developing a net-zero plan. At the direction of its majority shareholders, the company engaged VoltaGreen Engineering to strengthen its greenhouse gas inventory and to assess its existing and planned emissions-reduction initiatives. VoltaGreen Engineering also supported the company in establishing a structured pathway to begin its net-zero transition.
Our Solution – Laying the foundations: GHG emissions inventory and support
Developing a greenhouse gas emissions inventory is a core requirement of an effective ESG program. Reliable and well-structured emissions data establishes a clear baseline, supports credible target setting, enables ongoing performance tracking, and informs the identification of emissions reduction opportunities. VoltaGreen Engineering supported the client in developing its first Scope 1 and Scope 2 GHG emissions inventory across all direct operations, including power generation. The systems developed were designed to be repeatable and efficient, allowing the client to update future inventories annually, support third-party assurance, and strengthen long-term ESG performance monitoring and strategy development.
The Science Based Targets initiative (SBTi) is a global partnership that supports companies in setting credible emissions reduction targets aligned with climate science. It provides sector-specific guidance with defined criteria to help industries transition toward a low-carbon economy. For the power sector, SBTi guidance uses the Sectoral Decarbonization Approach and requires targets that address emissions from electricity generation under Scope 1, as well as emissions associated with electricity that are purchased and sold under Scope 3, Category 3. The guidance also allows for optional targets covering additional Scope 1, Scope 2, and Scope 3 emission sources, where relevant.
In line with these requirements, we worked closely with the client to assess its operations and address a central business challenge: delivering reliable and consistent power to customers while reducing emissions. Given that renewable energy sources such as solar and wind are inherently intermittent, the analysis focused on how existing renewable assets could be used most effectively, how those assets influenced the client’s Scope 1 emissions profile, and how the resulting data could support informed net-zero planning and long-term decarbonization strategy.
Energy Provider Drives ESG Programs and Training
Our client is a Ghanaian-based energy provider with sustainability at the core of its business. The company focuses on delivering clean, reliable energy while placing customers and communities at the center of its operations. It operates under high social, environmental, and governance standards and has committed to reducing its carbon footprint by 40% by 2030.
To support these goals, the company engaged VoltaGreen in 2022 to strengthen its ESG outreach and education efforts. The objective was to better understand customer perspectives on ESG issues and to equip both internal teams and external stakeholders with practical knowledge that supports informed, sustainable decision-making and measurable improvements.
Our Solution. We began our work by analyzing the client’s customer base to understand what customers value and how those values relate to environmental, social, and governance priorities. This helped the client see where sustainability matters most to its customers and where it can have the greatest impact. The analysis provided a clear direction for action. It showed how the client could focus its sustainability efforts on ways that align with customer expectations, stated commitments, and long-term goals.
Based on these insights, we supported the client in developing a practical outreach strategy. This included customer-facing communications, internal programs, and external engagement activities. Throughout the process, we emphasized clear and accessible language that customers can easily understand, while avoiding technical terms or industry jargon that could create confusion or distance.
As a next step, our team developed a training program for internal stakeholders, equipping client staff with the institutional ESG knowledge they needed to continue to drive internal ESG programs forward.
In 2024 and beyond, our work with the company expanded to include greenhouse gas emissions plan management, including a GHG inventory covering scopes 1 and 2. We are also working with our client to explore the feasibility of committing to and reducing emissions in accordance with the Science Based Targets initiative’s sectoral decarbonization approach (SDA) guidelines for the power sector. This methodology wholly involved the use of our custom-built in-house software and data reconciliation model.
Conducted full-scale environmental surveys, emissions monitoring, and waste management planning to ensure regulatory compliance and sustainable operations.
Designed and installed a hybrid solar and wind power system to provide sustainable, cost-effective electricity for continuous industrial operations.
Developed strategies to reduce carbon emissions and manage environmental risks for coastal operations, supporting long-term climate resilience.
Implemented automated carbon tracking across the supply chain, helping the client reduce emissions and achieve measurable progress toward SBTi targets.
Designed and installed a hybrid solar and wind power system to provide sustainable, cost-effective electricity for continuous industrial operations.
Conducted site-specific hydrocarbon spill risk analysis and mitigation planning to minimize ecological footprint and ensure regulatory compliance.
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