How does a cable maker count Zambian copper cathode in Scope 3?

Multiply tonnes bought by a per tonne footprint for that producer, cradle to gate. Copper is not a CBAM good, so this is Scope 3 only. Ask whether the figure covers mining, smelting and refining, and which year's grid power it uses.

What to ask

• CO2 per tonne of cathode and the boundary.
• Share from diesel, grid power and smelting fuel.
• Whether sulphuric acid by product got a share.

Records

Purchase invoices with tonnes and the producer on each lot, so the right figure attaches to each delivery.

Without data

Use a database average and say so. Producer data usually replaces it within a reporting cycle once you ask.

What Senseible does here

Senseible turns supplier invoices into a Scope 3 record with the supplier, quantity and factor behind every figure, so you can see which supplier data is still missing.

• Is copper covered by CBAM
• Copper cathode footprint
• Copper cable per km

Sources: GHG Protocol Corporate Value Chain (Scope 3) Standard, GHG Protocol Corporate Standard

Last reviewed 2026-10-21.