Key takeaways
- A plant buying 400 new five-wall boxes a month carries about 55 tons of CO₂e a year in packaging alone.
- Reuse usually scores under Scope 3 categories 1 and 5, GRI 306 and diversion targets — rarely under recycled content.
- Auditable data needs four things: unit counts tied to bills of lading, weighbridge weights, a published factor set and a stated counterfactual.
- Ask any supplier whether freight is netted off their impact figures. It separates arithmetic from marketing.
Sustainability teams tend to arrive at packaging late, after energy, fleet and product materials. By the time they get there, somebody has usually assumed the number is small. For most industrial operations it is not small — it is simply invisible, because nobody counts containers.
The arithmetic for a mid-sized plant
Four hundred five-wall gaylords a month, bought new and disposed of after one use:
- 4,800 boxes a year × 24 lb of board = 115,200 lb of containerboard manufactured
- × 0.95 lb CO₂e per lb = 109,440 lb CO₂e ≈ 55 tons a year
- Plus 311,000 gallons of process water
- Plus 58 tons of material entering disposal
Fifty-five tons of CO₂e is not a rounding error for most single sites. It is comparable to the annual footprint of a small vehicle fleet, and it sits in Scope 3 category 1 — purchased goods and services — where it is rarely itemised.
Where reuse lands in a framework
This causes more confusion than the arithmetic does. Reuse generally scores under three headings, and recycled content is not one of them:
| Framework area | Does reuse count? | How |
|---|---|---|
| Scope 3 cat. 1, purchased goods | Yes | Lower embodied emissions in procured packaging |
| Scope 3 cat. 5, waste in operations | Yes | Material diverted from the disposal stream |
| GRI 306 waste disclosures | Yes | Diverted tonnage by route |
| Zero-waste-to-landfill claims | Yes | Directly, with weighbridge evidence |
| Recycled content targets | Usually not | No new board is produced at all |
| Packaging reduction targets | Yes | Fewer units manufactured to serve the same volume |
That last mismatch trips teams up. A company with a recycled-content target sometimes finds that reuse does not tick its specific box, despite being substantially better environmentally. The answer is usually to report it under diversion and Scope 3 rather than trying to force it into a content metric.
What auditable data looks like
Four things, and if a supplier cannot produce all four, treat the number as marketing:
- Unit counts that tie to bills of lading, not to an estimate.
- Weights from a weighbridge, not from a catalogue.
- A published factor set with a revision number, so the calculation can be reconstructed.
- A stated counterfactual — what is assumed to have happened without the reuse.
Four questions from a customer’s reporting consultant in 2022 took us a year to answer properly. The document that resulted is now the most requested thing on our site after the size chart.
The freight deduction
We subtract transport emissions from the avoided-manufacturing figure using lane distance and matched backhaul share. It lowers our headline numbers by roughly seven per cent, and it is the reason our figures are smaller than some competitors quoting the same volumes.
If you are comparing suppliers’ claims, ask whether freight is netted. It is a fast way to work out who has done the arithmetic and who has done the marketing.
Getting started without a project
Count containers for one week at one site. Multiply by twelve, discount ten per cent for the tidiness of counting weeks, and apply the factors. That gives you a defensible order-of-magnitude number in about four hours — which is usually enough to establish whether the full exercise is worth doing.
Questions