Embodied Carbon

Embodied carbon refers to the greenhouse gas (GHG) emissions associated with producing, transporting, maintaining, and disposing of a physical product or building across its full lifecycle, including raw material extraction, manufacturing, transportation to site, installation, maintenance, and end-of-life disposal.

The term is most commonly used in construction and the built environment, where it describes the carbon locked into a building's materials and construction process. A steel-framed office building, for example, generates significant embodied carbon from the steel and concrete used in its construction before a single light is switched on. Once built, that carbon cannot be reduced. This is what makes embodied carbon distinct from operational carbon. Operational carbon covers the emissions produced by running a building or using a product over its lifetime. Operational carbon can be reduced through efficiency improvements over time. Embodied carbon is largely fixed at the point of manufacture or construction, making early-stage material and procurement decisions the primary lever for reducing it.

The term is also increasingly relevant in manufacturing and product design, where it aligns with the concept of a product carbon footprint and the data captured in environmental product declarations (EPDs). As regulations such as CSRD and the ESPR require more granular product-level environmental data, embodied carbon is becoming a relevant metric well beyond construction.

In corporate carbon accounting terms, embodied carbon typically sits within Scope 3 emissions, most commonly under Category 1 (purchased goods and services) or Category 2 (capital goods). It is often one of the largest and least-measured components of a company's total footprint. Measuring it accurately requires product-level data from suppliers, either through EPDs or lifecycle assessment (LCA) data, the same data infrastructure needed to measure Scope 3 Category 1 emissions under the GHG Protocol.