A former employee of this government agency, Brent Efron, compared this agency’s work to “throwing gold bars off the edge” on a Tinder date in a clip since used to justify investigations of it. A 1980s ruling supporting this government (10[1])agency, then led by Anne Gorsuch, (-5[1])created (10[1])deference to federal experts in interpreting unclear laws, (10[1])but was overturned in 2024. This government agency plans to rescind a 2009 “endangerment (10[1])finding” as (10[1])part of what Lee Zeldin has called (10[1])the US’s (10[3])“greatest day of deregulation,” including changing NAAQS regulations on PM 2.5. For 10 points, what Nixon-era (10[1])government agency is responsible for enforcing laws like the Clean Air Act? ■END■ (10[1]0[1])