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Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).
Comparative damage assessment of CDs 1B to 4 (a) using weight-based functional unit analysis for 1 kg of CDs produced and (b) using QYFL–based functional unit analysis.