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Research has mainly addressed solid fragments, while gaseous byproducts remain overlooked. Here, environmentally relevant abiotic aging under UVC radiation and mechanical stress shows that polyethylene plastics release a diverse mixture of volatile organic compounds (VOCs) and carbon dioxide (CO2). Multiscale analyses (ATR-FTIR, DSC, PTR-MS, and \u03bcGC-MS) link VOC emissions to chemical transformations within the polymer matrix. Life cycle assessment demonstrates that, despite trace-level concentrations, toxic VOCs such as acrolein dominate the human health and ecosystem damages. When extrapolated to global oceanic HDPE stocks (44.71 Mt), these emissions correspond to more than 5.4 \u00d7 1011 \u03bcPoints and 1.32 \u00d7 107 kg CO2eq in environmental impact. These findings uncover a neglected atmospheric dimension of plastic degradation, showing that volatile emissions represent a significant pathway of carbon release with implications for climate policy, risk assessment, and global plastic governance.<\/jats:p>","DOI":"10.1021\/acs.est.6c08594","type":"journal-article","created":{"date-parts":[[2026,7,20]],"date-time":"2026-07-20T09:40:37Z","timestamp":1784540437000},"page":"21180-21189","source":"Crossref","is-referenced-by-count":0,"title":["Plastic Airprint:\nThe Atmospheric and Environmental\nCost of Polyethylene Plastic Degradation"],"prefix":"10.1021","volume":"60","author":[{"ORCID":"https:\/\/orcid.org\/0009-0008-8218-4021","authenticated-orcid":true,"given":"Aicha","family":"El Kharraf","sequence":"first","affiliation":[{"name":"Universite\u0301 de Rennes, CNRS , , ,","place":["Rennes, France, F-35000"]},{"name":"Universite\u0301 de Rennes, CNRS , , ,","place":["Rennes, France, F-35000"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Murielle","family":"Rabiller-Baudry","sequence":"additional","affiliation":[{"name":"Universite\u0301 de Rennes, CNRS , , ,","place":["Rennes, France, F-35000"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-0823-5045","authenticated-orcid":true,"given":"Mark","family":"Wiesner","sequence":"additional","affiliation":[{"name":"Universite\u0301 de Rennes, CNRS , , ,","place":["Rennes, France, F-35000"]},{"name":"Duke University , , ,","place":["Durham, North Carolina, United States, 27708"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Daria","family":"Gudz","sequence":"additional","affiliation":[{"name":"Universite\u0301 de Rennes, CNRS , , ,","place":["Rennes, France, F-35000"]},{"name":"Universite\u0301 de Rennes, CNRS , , ,","place":["Rennes, France, F-35000"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Franc\u0327oise","family":"Binet","sequence":"additional","affiliation":[{"name":"Universite\u0301 de Rennes, CNRS , , ,","place":["Rennes, France, F-35000"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Dominique","family":"Bavay","sequence":"additional","affiliation":[{"name":"Universite\u0301 de Rennes, CNRS , , ,","place":["Rennes, France, F-35000"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Herve\u0301","family":"Tabuteau","sequence":"additional","affiliation":[{"name":"Universite\u0301 de Rennes, CNRS , , ,","place":["Rennes, France, F-35000"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Melanie","family":"Davranche","sequence":"additional","affiliation":[{"name":"Universite\u0301 de Rennes, CNRS , , ,","place":["Rennes, France, F-35000"]}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"316","published-online":{"date-parts":[[2026,7,20]]},"reference":[{"issue":"5","key":"2026080409303762400_cit1","doi-asserted-by":"publisher","first-page":"374","DOI":"10.1038\/s41558-019-0459-z","article-title":"Strategies to Reduce the Global Carbon Footprint of Plastics","volume":"9","author":"Zheng","year":"2019","journal-title":"Nat. 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