Walk through a British supermarket and plastic appears to be everywhere: around cucumbers, beneath berries, across ready meals and over food that has a perfectly good peel. The reflexive question is why shops cannot simply remove it. The better question is what each package is doing, whether that job is necessary and what replaces it if the plastic goes.
Supermarkets like plastic for practical reasons. It is light, sealable, often transparent and adaptable to fast packing and transport. It can protect fragile or perishable food, carry information and make stock easier to handle. Those benefits are real. So are the costs of producing disposable material and managing the waste it leaves behind.
A wrapper can protect more than a product
Food waste has an environmental cost: the land, water, energy and labour used to produce discarded food are lost with it. Packaging can sometimes extend a product's usable life or prevent damage in distribution. A review of removing plastic from fresh produce warned that shorter shelf life may increase food waste for some items.³ The implication is not that every apple needs a bag. It is that an honest comparison must include what happens to the food as well as the wrapper.
Different foods make different demands. A delicate punnet of berries may need protection from crushing. A loose root vegetable may need very little. A multipack can be convenient for shelf stacking and scanning while forcing a customer to buy more than they can eat. The environmental answer can therefore vary even within one aisle.
Packaging also suits the economics of a large shop. Standardised units move easily through warehouses, fit shelves and support self-service. A label carries dates, ingredients and prices. Some functions could be delivered by shelf signs or reusable containers, but changing systems means redesigning equipment and routines. What is cheap for a retailer at the checkout may leave a cost for the council or environment after use.
The problem with a simple swap
Paper, glass, aluminium and compostable materials all have uses, but none is automatically the greener replacement for every plastic film. Producing and transporting heavier packaging can have different emissions and resource demands. A United Nations Environment Programme review of supermarket food packaging uses life-cycle assessment to compare options and stresses that results depend on the product, reuse and disposal system.¹
“Recyclable” also needs context. A package may be technically recyclable yet difficult to collect, sort or process where the customer lives. Mixed layers that keep food fresh can complicate recycling. Conversely, some rigid formats are collected widely. The latest UK waste statistics provide a view of packaging recycling overall, but that number should not be mistaken for proof that each piece of supermarket plastic becomes a new package.⁵
Plastic pollution is not fully captured by a carbon calculation. Litter can persist and harm habitats even where a lightweight wrapper has lower production emissions than a heavier alternative. The life-cycle lens is valuable because it widens the comparison, but the choice of what to measure matters. A responsible supermarket has to consider leakage into the environment as well as climate and food loss.
The UK’s Plastic Packaging Tax applies to qualifying plastic packaging with less than 30 per cent recycled content, giving producers a financial reason to use more recycled material.⁴ It addresses the content of packaging, not the total amount put on shelves. A wrapper can satisfy a recycled-content threshold and still be unnecessary.
Designing out the unnecessary
The clearest win is often a package avoided without causing more waste or shifting harm elsewhere. Loose produce, sensible portion sizes and well-designed refill systems can reduce material. But refill only performs well when containers are actually reused enough, cleaned effectively and convenient enough that people will participate. A shop should test these systems on real customers and track food waste alongside packaging use.
UNEP’s work on ending plastic pollution puts unnecessary and problematic plastic reduction beside reuse, redesign and stronger waste management.² That hierarchy is more useful than a blanket demand to substitute one disposable item for another. Better design can mean a simpler single material, less of it, or a format that protects food for longer without multiplying layers.
One practical measure is to compare what leaves a shop with what returns. A retailer can count packaging placed on the market, the share collected through real systems and the food discarded at each stage. That makes it harder to declare success by changing a label while total waste rises. It also shows where a packaging change genuinely improves the whole system.
Consumers have a role, though they cannot redesign a national supply chain alone. Buying only what will be eaten, choosing loose produce when practical and following local recycling rules can help. The larger decisions about packaging specifications, procurement and collection sit with retailers, manufacturers and policymakers.
A more revealing question at the shelf
The visible wrapper can provoke an easy moral judgement. Yet a naked product that spoils before it is used is not a victory, and a heavily wrapped one may be wasteful even if it stays fresh. The job is to measure both.
For every format, ask: what food does this protect, how much material does it use, can it be avoided or reused, and what actually happens after disposal? British supermarkets do not use plastic because they are mysteriously fond of it. They use it because the present system rewards convenience and low immediate cost. Changing that system requires better information and better incentives, not merely a different-looking wrapper.