If the EPA agrees, environmentalists fear that the decision could have wide implications, significantly curbing the EPA’s ability to limit nearly 200 pollutants from thousands of industrial plants. The next time new science reveals that a chemical is much more toxic, or that the amount of pollution released from a factory had been underestimated and would cause legally unacceptable health risks, the agency would not be able to react. “It’s a poor reflection on this administration’s claim that they are actually interested in clean air,” said Ana Baptista, a professor of environmental policy and sustainability management at The New School. “By saying we’re no longer going to consider science, it’s abdicating your mission.” The EPA didn’t address ProPublica’s questions about the ethylene oxide reevaluation or its broader implications. Instead, the agency pointed to a March press release about how it was reconsidering multiple air pollution rules issued by President Joe Biden’s administration, including the ones for chemical plants and commercial sterilizers. “EPA is committed to using the gold standard of science during these reviews,” a spokesperson said in an email. “Since day one, EPA has been clear that providing clean air, water, and land for all Americans is a top priority.”