A study by the UK-based Waste & Resources Action Programme (WRAP) has revealed that the carbon impact of bottling wine in light glass bottles with a high recycled content compares favourably with using PET containers.
The WRAP report looked at the carbon impact of production and transportation of 750ml glass and PET wine bottles. It established that significant reductions in carbon dioxide (CO2) can be made through reducing the weight and increasing the recycled content of glass bottles.
In its report summary, WRAP said: “Lightweighting bottles has been shown to have benefits in terms of CO2 savings from transport of loads. Consequently, reducing glass bottle weight reduces the quantity of CO2 emissions associated with wine packaging.”
The study showed that a 54g PET container came out only marginally lower than a 365g glass bottle when using the medium estimate for glass production emissions. The higher carbon dioxide emissions arising for PET from manufacture offset much of the savings obtained from its low weight.
In both scenarios, excluding or including end-of-life, the emissions attributed to the 54g PET bottle lay within the range of emissions attributable to the 365g glass bottle.
“This is an important piece of work that demonstrates the positive environmental impact of lightweighting and the incorporation of recycled content,” said Richard Swannell WRAP director of retail and organics programmes.
“It will help inform the wine, packaging and retail industries on the environmental impact of their packaging choices.”
Amorim’s director of marketing and communications Carlos de Jesus said the findings were an important contribution to the emerging debate on using plastic wine bottles versus glass to reduce carbon dioxide emissions.
“When you add cork's net carbon dioxide retention to the equation it is clear that a lightweight glass bottle with a high recycled content sealed with a natural cork is a winner for the environment,” he said.
“This combination also retains the premium positioning that can only be achieved with wine packaged in a glass bottle sealed with a natural cork.”
The full WRAP study report is available at www.wrap.org.uk/retail

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