This week at Treehugger: Biodiesel starts flowing at Brazialian gas stations; a couple sets out on a road trip to set the Guinness World Record for fuel efficiency by driving around the world on less than 50 tanks of gas (they re currently on tank number four); a 330 MPG diesel concept car that is so ugly it s beautiful; and Toyota s hybrid language Superbowl TV ad for its hybrid Camry.
[Treehugger's Perspective Shift roundup appears every Wednesday]