Springfield (The Simpsons) endowed with flippered mutants. In the Season 25 episode "Homerland", he comments that the air conditioning system has never worked properly. In one episode, Mr. Burns mentions that he owns the electric company as part of his power monopoly. The design and folly of Springfield Nuclear Power Plant is often rumored to be based on the troubled Trojan Nuclear Power Plant (closed in 1993 due to defects) near Matt Groening's home town of Portland, Oregon, or the Hanford Site in southeastern Washington. However, Antonia Coffman, Groening's publicist, has said that the Springfield plant's design is generic and that "the Springfield
Matt Groening that he feared viewers would "see it as nothing but a pathetic attempt to advertise "The Critic" at the expense of "The Simpsons"," and was concerned about the possible implication that he had created or produced "The Critic". He requested his name be taken off the episode. Groening is credited with writing or co-writing the episodes "Some Enchanted Evening", "The Telltale Head", "Colonel Homer" and "22 Short Films About Springfield", as well as "The Simpsons Movie", released in 2007. He has had several cameo appearances in the show, with a speaking role in the episode "My Big Fat Geek Wedding".