Evidence standards
SPG Environmental Reporting: What Independent Verification Would Need
Independent verification must have a defined subject and scope.
RESEARCH ARCHIVE
Author: leaksspgpack
Methods
SPG Packaging Comparisons: A Life-Cycle Boundary Worksheet
Packaging comparisons need an equivalent function and a stated boundary.
Reuse
SPG Returnable Packaging: Count Uses, Losses and Return Journeys
Returnable packaging needs an operating record, not only a durable design.
Circular systems
SPG Recyclability Claims: Ask About the Actual Recovery Route
A recyclability question is partly a route question.
Circular systems
SPG Closed-Loop Packaging: Map Collection, Processing and Return
A closed-loop description should be read as a system with several steps.
Measurement
SPG Plastic-Reduction Claims: Define the Baseline Before Comparing
A plastic-reduction statement needs a baseline that readers can understand.
Materials claims
SPG Recycled and Renewable Materials: Keep the Categories Separate
Recycled and renewable describe different material attributes.
Measurement
SPG Greenhouse-Gas Intensity: Why the Denominator Matters
An emissions-intensity statement needs its denominator.
Reporting
SPG’s Impact Report: A Version and Reporting-Period Reading Guide
An impact report should be read as a versioned document with a defined reporting period.
Environmental claims
SPG Sustainability: Turn Broad Environmental Language into Checkable Questions
An environmental claim becomes more useful when its subject and supporting evidence are explicit.