I was stranded in the Arizona desert in my broken-down truck wondering if I had made a big mistake: Our CNN.com biofuel road trip seemed doomed to fail.
My newly purchased 1978 International Harvester Scout quit on me during our very unscientific experiment to drive a biodiesel-powered truck from California to Georgia in two-weeks.
Under a hot sun, with no air conditioning in the truck, I feared that my Scout would be stolen while I went for help. Worse, I worried that I'd be forced to abandon the vehicle altogether and return home to Atlanta with my tail between my legs. 
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CNN's Debra Alban contributed to this report.
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