The United Nations Office for Project Services, widely known as UNOPS, is pushing climate accountability into the core of development work by tackling the most elusive part of its carbon footprint: Scope 3 emissions. In this episode of DevelopmentAid Dialogues, host Hisham Allam speaks with Samantha Stratton-Short, Head of Strategic Initiatives, Infrastructure and Project Management at UNOPS and Manager of the UNOPS Climate Action Programme, about a new methodology designed to map, measure, and manage the emissions embedded in every stage of UNOPS’s value chain. 

Scope 3 emissions – those generated by suppliers, contractors, travel and the full life cycle of procured goods and infrastructure – typically account for 70-90% of an organization’s greenhouse gas footprint yet are the hardest to track because they depend on external data and lie outside direct operational control.  

“Reducing our direct operational emissions is a core responsibility for UNOPS,” Stratton-Short notes, “but we must go beyond that and measure the emissions of our suppliers, our partners and our implementation activities as well.” This broader view, she argues, “allows us to understand the full climate impact of our work and gives us the ability to influence others, even markets, to adopt new low-carbon solutions.”​ 

Over three years, UNOPS developed a step-by-step methodology that is compliant with the Greenhouse Gas Protocol but tailored to non-commercial, humanitarian operations and UN values such as inclusivity and stakeholder engagement. “We couldn’t just copy-paste private sector solutions,” she says, pointing to the unique way UN entities operate across more than 150 countries and project types. The result is a materiality framework that, in her words, is “robust enough to be scientifically sound, yet flexible enough for the UN’s complexity,” capable of systematically identifying “the highest emitting areas in our value chain with a specific focus on the delivery of development projects.”​ 

The stakes are especially high in conflict-affected contexts such as Yemen, Afghanistan or Somalia, where resource scarcity and climate stress already feed instability. Here, the methodology helps UNOPS “prioritize solar-powered infrastructure and green procurement,” reducing dependence on diesel and making essential services less vulnerable to supply shocks and price volatility. 

Listen to the full episode with Samantha Stratton-Short on DevelopmentAid Dialogues. Stay informed. Stay engaged. 

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