What are Scope 3 emissions?
The GHG Protocol divides greenhouse gas emissions into three categories, known as scopes. Scope 3 is usually the most comprehensive category and includes all indirect greenhouse gas emissions along a company’s value chain, except indirect emissions from energy use. Since Scope 3 emissions are not directly caused by a company, measuring them is complex and requires comprehensive analysis.
Overview of the different scopes as defined in the GHG Protocol:
- Scope 1 – direct emissions from company-owned sources
- Scope 2 – indirect emissions from energy use
- Scope 3 – remaining indirect emissions along the entire value chain
The GHG Protocol provides internationally accepted and widely used standards for measuring, reporting, and assessing CO₂, methane, as well as other greenhouse gas emissions. It supports companies and organizations in reducing negative environmental impacts and achieve their climate goals.

Categories of Scope 3 emissions
The GHG protocol differentiates between upstream and downstream GHG emissions. While upstream Scope 3 relates to emissions in the supply chain, downstream contains those GHG emissions that occur after an organization’s products or services have been sold, for example through product use or consumption.
Upstream emissions
Upstream Scope 3 emissions encompass all indirect emissions that occur along a company’s supply chain, but are not directly owned or controlled by the organization. These upstream emissions can include a wide range of sources, depending on the nature of the organization and its operations.
Sources of upstream Scope 3 emissions
- Purchased goods and services
- Capital goods
- Fuel- and energy-related activities which are not included in Scope 1 or Scope 2
- Upstream transportation and distribution
- Waste generated in operations
- Business travel
- Employee commuting
- Upstream leased assets
Downstream emissions
Downstream Scope 3 emissions are another category of greenhouse gas emissions that fall under the broader framework of Scope 3 as defined by the GHG Protocol. These emissions are also indirect and caused by the use or disposal of an organization’s products and services.
Sources of Downstream Scope 3 emissions
- Transportation and distribution
- Processing of sold products
- Use of sold products
- End-of-life treatment of sold products
- Downstream leased assets
- Franchises
- Investments
In most cases, downstream emissions remain difficult to reduce because companies have limited direct control over emissions related to the products they sell. Therefore, effectively managing downstream emissions requires stronger customer engagement and more sustainable product design wherever applicable.
Why should organizations measure Scope 3 emissions?
Measuring Scope 3 emissions is primarily of legal relevance: The EU Corporate Sustainability Reporting Directive (CSRD) requires companies above a certain size to report their Scope 3 emissions – according to EU estimates, nearly 50,000. The metrics are therefore particularly important for sustainability reporting, as they help companies to meet their accountability obligations.
This not only improves transparency for communication with external stakeholders but is also particularly valuable for internal decision-making. After all, Scope 3 usually accounts for the majority of emissions generated by companies. Therefore, this area often also offers the greatest opportunities for improving an organization’s carbon footprint in order to achieve climate targets. Scope 3 analysis creates a scientific basis by identifying environmental hotspots and reduction potentials along the supply chain.
How can organizations reduce Scope 3 emissions?
Analyzing the value chain is a key step in order to identify which areas of a company generate the highest Scope 3 emissions. Therefore, the screening and identification of the most relevant Scope 3 categories is essential for measuring emissions.
Once the relevant categories are identified, both upstream and downstream, the next step is to quantify the emissions resulting from these categories. The outcome of this analysis can be adapted according to the requirements of the company – for example, by geographic region, sector, business unit, commodity, department, or supplier – and disaggregated at various value chain levels. This hotspot analysis allows supplier lists to be adjusted, purchasing decisions to become targeted, and an uplift in innovation.
How can WifOR support companies?
WifOR’s Scope 3 Assessment is based on the methodology recommended by the GHG Protocol. The approach is broken down into three steps: identifying relevant Scope 3 categories for an organization or industry, quantifying the emissions throughout the global value chain, and adapting results according to the customers’ needs to provide relevant insights.
To calculate global impacts, WifOR uses an environmentally extended input-output model. These results are then refined to provide insights at the country, product, department or, depending on the data, supplier level. Therefore, WifOR has the ability to provide results at any required granularity level.
This offers a variety of benefits for organizations and industries:
- Establishing a scientific basis for holistically managing environmental sustainability
- Providing insights into environmental hotspots and reduction potentials in the value chain
- Opening new channels of dialogue with stakeholders across society and supporting informed communication
- Enhancing non-financial reporting based on reliable data
Learnings from our Scope 3 Masterclass with Insights from Takeda and Evonik
Collaboration across the value chain is essential to move from isolated decarbonization efforts to improved impact. This was one of the key takeaways from WifOR Institute’s Scope 3 Masterclass, moderated by Paulina Rossnagel. Together with Jessica Vieira, PhD (Takeda) and Ranjan Fletcher (Evonik), the session explored perspectives from both the manufacturer and supplier sides – and what it takes to translate net-zero targets into coordinated progress.
Watch the session recording here.
Calculate your Scope 3 emissions with WISIT
In this video you can learn how Scope 3 emissions in the supply chain can be calculated using WISIT – the WifOR Institute Sustainability Impact Tool.
Download the Scope 3 methodology for WISIT here.
Latest articles from WifOR’s Sustainability Research
-

For measurable returns and societal value
Impact Investing: Assessing and Effectively Guiding Investment Outcomes
-

Evidence-based prioritization using Impact Valuation
Materiality Assessment: definition, guidelines, and examples
-

Interview with Dr. Richard Scholz
Using Impact Valuation to act responsibly – along the supply chain



