 GM said in a statement, it has complied with all regulations in pollution and mileage certification of its vehicles. The company said it's not admitting to any wrongdoing, nor that it failed to comply with the Clean Air Act. Higher education doesn't necessarily make for smarter people, but WTOP business reporter Jeff Claybaugh says it does make the D.C. metro among the most educated. WalletHub's annual list of most educated cities ranks the D.C. area at number three.