A packaging footprint cannot be copied from one market to another

Several variables differ systematically between markets, and each changes the footprint of the same pack.

Energy supply is the first, and often the largest. The emissions associated with a unit of electricity depend on how it was generated, and the mix differs between markets and changes over time. A material or process that is electricity-intensive therefore carries a different footprint depending on where the electricity came from.

Logistics distance is the second. The transport associated with moving material and finished packs depends on how far they travel, by which mode, at what load factor. A pack made close to where it is used has a different transport component from one made far away, and the difference can be material for bulky or heavy formats.

Water context is the third, where water use is in scope. Water consumption carries different significance depending on the local resource position, and the treatment of water in an assessment depends on the method being applied and the context in which it is being used.

End-of-life is the fourth. What happens to a pack after use depends on the collection and processing infrastructure available where it is used, which differs between markets. An assessment that assumes a particular end-of-life route is making an assumption about infrastructure that may not hold in a different market.

Data quality and factor versions run through all of these. The background data used to represent a process or a material comes from a specific source at a specific version, and versions are updated as evidence improves. A figure produced with one version is not directly comparable with one produced with another unless the difference is accounted for.

Three measures are frequently used as though they were interchangeable, and they are not.

Recycled content describes how much of a pack's material came from recycled sources. It is a statement about origin. It says nothing directly about the environmental impact of producing the pack, and it says nothing about whether the pack can be recycled after use.

Recyclability describes whether a pack can be recycled, and it depends on the material, the design and — critically — on whether the infrastructure exists where the pack is used. It is a statement about what is possible in a given system. A pack that is technically recyclable in a market with the relevant collection and processing is not thereby recyclable in a market without them.

Footprint is a quantified environmental impact, calculated against a functional unit and boundary. It is a statement about impact, and it is determined by far more than the recycled content or the recyclability of the pack.

A pack can score well on one and poorly on another. A pack with high recycled content may have a high footprint if the recycling process is energy-intensive. A recyclable pack may have a higher footprint than a non-recyclable alternative that uses less material. A low-footprint pack may be neither recyclable nor made from recycled material. Using one of the three as a proxy for the others produces conclusions the analysis does not support.

The practical consequence is that a packaging comparison across markets must be built for the markets it covers rather than imported from one of them. That means restating the functional unit and boundary, obtaining data for the actual processes, energy supplies and routes involved, using a consistent factor version, and testing how sensitive the conclusion is to the assumptions that could not be established precisely.

Sensitivity testing deserves particular emphasis, because packaging comparisons are frequently close. Where two options are within a few per cent of each other on a footprint measure, the conclusion typically rests on one or two assumptions — a load factor, a transport distance, an end-of-life rate — and reporting the difference as a result without testing those assumptions overstates what the analysis supports. Presenting the result as a range, and naming what drives it, is the honest form.

Two prohibitions follow from the same reasoning. No country-level emission factor should be invented or assumed, because the actual figure depends on the specific process and supply in question. And no material should be described as universally better, because the comparison depends on the product, the route, the market and the end-of-life system — which is to say, on the specific case. The same discipline applies to circular economy work generally, where the material's full cycle rather than a single attribute determines the result — a point the UAE's own circular economy policy reflects in its emphasis on sustainable production and consumption across sectors [B].

The same applies in both directions, which is worth stating plainly: there is no general rule that a pack made or used in one market is better than one made or used in another. The question is always the specific comparison, made with the data for the specific case.