A recent peer-reviewed study, published in Cleaner Environmental Systems and led by the University of Applied Science Vienna, has shed new light on the environmental impact of polyethylene (PE) packaging. The research concludes that PE packaging generally results in a lower life cycle global warming potential (GWP) than widely used alternatives such as paper, metals, and glass—particularly within European contexts.

This comes at a critical time, as the European Packaging and Packaging Waste Regulation (PPWR) took effect in February 2025. As policymakers work to implement and refine delegated acts under the regulation, the study provides evidence urging a more nuanced approach to material substitution in packaging.

“Polyethylene packaging plays a critical role in preserving and protecting goods across value chains, and our study demonstrates its potential environmental advantages over many recognized alternative materials,” said Manfred Tacker, lead author of the study.

The multinational research team included experts from Circular Analytics TK GmbH, Michigan State University School of Packaging, and was conducted in collaboration with ExxonMobil. All findings adhered to ISO 14040/14044 LCA standards, analyzing 50 packaging formats across five application areas: pallet wraps, collation packaging, rigid non-food containers, heavy-duty sacks, and flexible food packaging.

Among the key findings:

• 68% of evaluated applications (34 out of 50) showed lower life cycle GWP for PE packaging.
• When compared to paper and paper-multimaterial packaging, PE had a lower GWP in 19 of 35 cases.
• Replacing PE packaging with alternatives would increase GWP emissions by up to 6.96 million tons of CO₂ equivalent, a rise of 40–64%.
• Substitution would also increase packaging weight by at least 244%, thereby intensifying material, transport, and waste demands.
• No alternative materials offered clear advantages in water scarcity or fossil resource usage.

These conclusions challenge prevailing assumptions about paper and glass being inherently more sustainable than plastics. Instead, the findings underscore the importance of considering full life cycle impacts rather than making material choices based solely on public perception or single indicators.

According to Rafael Auras, co-author and professor at Michigan State University, “Policymakers should holistically assess product-packaging systems to effectively reduce GWP and other environmental impacts across the supply chain. LCA is a valuable tool to inform such evaluations.”

The study ultimately advocates for data-driven, evidence-based decisions in shaping sustainable packaging policies. It serves as a reminder that well-intentioned shifts away from plastic may inadvertently worsen environmental outcomes if not guided by comprehensive assessments.

As Europe continues its transition to a circular economy, this research may play a vital role in guiding industry leaders and regulators toward packaging solutions that balance performance, efficiency, and environmental stewardship.