Abstract
The US Environmental Protection Agency has roundly rejected a controversial, chemical industry–backed analysis of the health hazards of ethylene oxide. In a Dec. 21 notice , the EPA says it is standing firm on an assessment of the carcinogenic gas that the agency finalized in 2016 after extensive scientific peer review and public comment. The agency concludes there is no new scientific evidence that would alter key aspects of that hazard evaluation. The EPA says it will maintain a 2020 Clean Air Act regulation for chemical manufacturers that relies on its assessment. The regulation requires companies to curb ethylene oxide emissions from leaks, vents, and storage tanks to protect the health of people living near industrial plants. Ethylene oxide is a chemical building block made from natural gas or petroleum. It is used to produce surfactants and plastics and to sterilize medical equipment. In 2020, the Texas Commission on Environmental
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