Abstract
Rejecting industry arguments, a federal court in late August upheld a limit for smog pollution set by the Obama administration to protect health. At issue was a 2015 Clean Air Act regulation that tightened the allowable limit of ground-level ozone, a major component of smog, to 70 ppb. The previous limit was 75 ppb, set in 2008. The 2015 rule was among those listed as “Top Regulations of Concern” that industry, including several chemical companies, asked the Trump administration to ax. The US chemical sector’s main lobbying association, the American Chemistry Council (ACC), is one of many business groups that opposed the 2015 standard. In addition to affirming the lower limit for ozone, the US Court of Appeals for the District of Columbia Circuit struck down a provision of the rule that ACC backed. That part would have allowed some facilities with pending applications for Clean Air Act permits to
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