BY ELIZABETH HARBALL
FLAGSTAFF, Ariz. -- One of Good Earth Power AZ's major hurdles lies in a storage room at the back of the company's office here in northern Arizona, arranged in tidy piles on tarps.
Stephen Horner gestured at mounds of bark, chopped-up branches and pine needles, arranged in order of increasing density.
"We have to find customers for all this stuff," he said...