Edmunds Daily has a good article on natural gas vs biodiesel vehicles, namely the Honda Civc vs the Volkswagen Jetta TDI. Its a good pro vs cons of two vehicles using "clean fuel" comparison.

The New 2009 Volkswagen Jetta TDI recevfed Motorweek's Driver Choice Award.  Efficient. Clean. Green. Fun to drive. And can use biodiesel.  What else can you ask for?

From Motorweek - "Consumers these days are demanding new cars be clean, green, and efficient. Yet, they don't want to give up comfort and fun-to-drive in their pursuit to be responsible. And, no car lives up to that lofty standard better than our 2009 MotorWeek Drivers' Choice pick as Best of the Year, the Volkswagen Jetta TDI. The Jetta TDI is the first diesel to win MotorWeek's top honor, and the first clean diesel car to be available in all 50 states."