"Natural Resources and Environmental Law in the Trump Era" - noon-1 p.m., Fiske Room, 1912 Center, 412 E. Third St., Moscow. UI College of Law associate dean for faculty development Jerry Long will speak. Public.Costume Sale - 1:30-4:30 p.m., Hartung Theater lobby, 625 Stadium Drive. The UI Department of Theatre Arts will hold a fundraiser Halloween costume sale with teen and adult costumes, plus accessories. Cash and checks accepted.