Romney used a bully pulpit approach towards promoting his agenda, staging well-organized media events to appeal directly to the public rather than pushing his proposals in behind-doors sessions with the state legislature. He dealt with a public crisis of confidence in Boston's Big Dig project – that followed a fatal ceiling collapse in 2006 – by wresting control of the project from the Massachusetts Turnpike Authority. After two years of negotiating the state's participation in the landmark Regional Greenhouse Gas Initiative that instituted a cap-and-trade arrangement for power plant emissions in the Northeast, Romney pulled Massachusetts out of the initiative shortly before its signing in December 2005, citing a lack of cost limits for industry.