Alexis Madrigal at Wired digs into the stats, and find that the state of California uses more gasoline than any country in the world.
"That means California's 20 billion gallon gasoline and diesel habit is greater than China's! (Or Russia's. Or India's. Or Brazil's. Or Germany's.)
That's according to the California Energy Commission's State Alternative Fuels Plan, which was posted online last Christmas Eve (pdf). The whole report makes for some fascinating reading because it's a blueprint for a low-carbon and renewable transportation fuel future. The dominant takeaway: it ain't going to be easy."