A fundamental misalignment exists between current product carbon footprint (PCF) standards (ISO 14067, PAS 2050, GHG Protocol, EU PEF, GB/T 24067) and the task of evaluating product carbon emission levels. This paper systematically examines this misalignment across ten dimensions: standard positioning, system boundary, functional unit, allocation methods, data quality, Product Category Rules (PCR), single-environmental-dimension limitation, geographic and technological disparities, international mutual recognition, and the inherent flexibility-comparability trade-off. The analysis reveals that existing standards function as "measuring tapes" rather than "calibrated rulers"—they cover only the quantification methodology layer, lacking both an evaluation benchmark layer and a tiered labeling layer. The ten limitations are synthesized into three levels: positional misalignment (root cause), methodological inconsistency (technical cause), and institutional deficiency (external cause), with the deep root cause lying in a tool mismatch between universal quantification standards and product-specific evaluation benchmarks. The paper concludes with systematic recommendations including establishing sectoral benchmark systems, expanding PCR coverage, and advancing international mutual recognition.
关键词
产品碳足迹/碳排放评价/ISO 14067/生命周期评价/碳标准
Key words
product carbon footprint/ carbon emission assessment/ ISO 14067/ life cycle assessment/ carbon standards
