That’s Mr. Mayor John to you.thecapsolution.org7. John Fetterman. The mayor of Braddock, Penn., is a big, bald, tattooed badass. Who just happens to have a heart of gold. “Mayor John,” as he’s known, is reinventing this downtrodden steel town in Pittsburgh’s shadow — and getting the word out about proactive climate and energy solutions. Yeah, that’s right, he’ll carbon cap your ass.