Where the footprint actually is

Why estimates fail here first

What to do about it

Why procurement owns this

Purchased goods carry most of the emissions and the least of the evidence. A field guide for procurement.

Ask a company where its emissions are and the honest answer is rarely the factory floor. For most, the bulk of the footprint is embedded in the goods they purchase — raw materials, ingredients, commodities.

It sits in one line of the greenhouse-gas inventory: Scope 3, Category 1. It is the biggest number on the page and the one built on the weakest data, and closing that gap is a procurement problem before it is a reporting one.

Scope 1 is what you burn. Scope 2 is the energy you buy. Scope 3 is everything else in the value chain — and Category 1 , purchased goods and services, is usually the largest slice of the whole thing. It is also the hardest to measure, because it happens on someone else’s land, in someone else’s process, often several steps upstream.

The awkward implication is that a company can run an immaculate Scope 1 and 2 program and still have barely touched the majority of its emissions. The real work is upstream, in the commodities.