It’s no secret that California is a trend-setting state, but Thursday, April 23 marked the start of a truly groundbreaking initiative. California’s Air Resources board approved a regulation to cut down on the carbon content of the state’s fuels by 2020. This is part of the Golden State’s larger plan to reduce greenhouse gas emissions within the same time frame, and the first regulation of its type to be approved—anywhere. Governor Arnold Schwarzenegger lauded the legislation, citing it as a way to encourage innovation. Now it’s just a matter of time until other states follow California’s trailblazing footsteps.