The Core Insight
Embodied carbon is locked in the day a building goes up — and no future fix can undo it
The A1–A3 footprint of concrete and steel is emitted before the building is even occupied. It cannot be retrofitted or decarbonised later — which makes the choice of materials, today, the decisive lever. The tool makes that locked-in carbon visible and shows where to cut it.
~10%of global energy-related emissions are embodied (A1–A3)
20–25%of a building's lifecycle carbon is embodied
50 yrlifetime over which upfront carbon is annualised
3material levers modelled: cement, steel, concrete
The question is no longer whether to act — it is which material, in which country, in which decade. This tool answers that.