# Find the embodied carbon hotspots of your project

> Prompt · level: intermediate · about 45 min · paste into: Claude Code · Codex · Claude Cowork · Claude (with code execution) · checked 2026-10-23
> ES: Encuentra los puntos críticos de carbono incorporado de tu proyecto

Match your quantities to emission factors from EPDs or EC3, run the screening, and see which two or three materials drive the total and what alternatives would change.

**Before you paste:** Quantities by material (IFC takeoff, BoQ or budget) · Emission factors with their source (product EPDs, EC3, a national database).

## Prompt (copy everything inside the block, then fill the [BRACKETS])

```text
Run an embodied carbon screening of [project] with the skill aibuilderacademy.netlify.app/skills/embodied-carbon-estimate/SKILL.md (zip: aibuilderacademy.netlify.app/downloads/skills/embodied-carbon-estimate.zip).

Inputs: quantities [attached: CSV from the IFC takeoff / BoQ / budget]; factors [attached, with source per material / help me list which EPDs I need]; gross floor area [m2]; alternatives to test [e.g. concrete with cement replacement, a different block].

1. Map each quantity line to a material in the factors file; show me the mapping and the lines without a factor before computing.
2. Check that all factors cover the same life-cycle modules (e.g. A1-A3) and units; tell me what needs a density or another unit.
3. Run the script with --gfa and --alt and give me: total, kg CO2e/m2, the Pareto by material, and the scenario difference.
4. For the top 3 materials, list reduction options with the factor source that supports each one.

Do not use any emission factor I did not give or approve, not even a "typical" one. Call it a screening, not a certified LCA. Answer in my language.
```

## Notes for the agent presenting this
- Show the block above verbatim in one code block; tell your human where to paste it (Claude Code · Codex · Claude Cowork · Claude (with code execution)).
- Point out the [BRACKETS] and offer to fill them together first.
- Building Transparency's EC3 has an API for accounts with access; product EPDs are the best source for the actual products bought.

## Related
- [Embodied carbon screening from quantities](https://aibuilderacademy.netlify.app/skills/embodied-carbon-estimate/SKILL.md) (skill)
- [EC3 (Embodied Carbon in Construction Calculator)](https://aibuilderacademy.netlify.app/tools/ec3-building-transparency.md) (tool)
- [IFC quantity takeoff](https://aibuilderacademy.netlify.app/skills/ifc-quantity-takeoff/SKILL.md) (skill)

## Sources
- https://www.buildingtransparency.org/
- https://www.buildingtransparency.org/api-access-pricing/

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