Switching material from plastic to paperboard can reduce a packaging's climate impact by 99 per cent. For people who influence the choice of packaging material, this single choice can make the biggest climate impact during a product manager or designer's entire professional career. That's the conclusion of a study done by IVL Swedish Environmental Research Institute for Iggesund Paperboard.
The starting point was to study some of the commonest packaging types and compare the differences in climate impact depending on the choice of packaging material.
"There are tables giving carbon dioxide emissions per kilo of material, but when you compare real examples of packaging, you realise the great importance of the choice of material," comments Johan Granås, Sustainability Director at Iggesund Paperboard.
"Plastic is a fantastic material for many applications and we use it ourselves when producing paperboard for food packaging that needs a thin plastic barrier to protect its contents," he adds. "But we believe that decision makers in the packaging industry must know about the effects of their choice of material."
Packaging light bulbs in plastic or paperboard respectively is the most extreme example in the survey. By switching from plastic to paperboard, it is possible to reduce the climate impact of the packaging by 99 per cent. In the example that was most favourable for plastic, a paperboard carton containing 500 grams of pasta was compared with the corresponding amount of pasta packed in a thin plastic bag. The conclusion was that the plastic bag has a 3.25 times larger climate impact than the paperboard carton. This is despite the fact that the bag only weighs one-sixth as much as the carton and has significantly worse protective and stacking properties.