Chicago Tribune
By JOHN FLESHER
AP Environmental Writer
3:55 p.m. CST, November 21, 2009
PARK FALLS, Wis. - Forests are a treasure trove of limbs and bark that can be made into alternative fuels and some worry the increasing trend of using that logging debris will make those materials too scarce, harming the woodlands.
For centuries, forests have provided lumber to build cities, pulp for paper mills and a refuge for hunters, fishers and hikers. A flurry of new, green ventures is fueling demand for trees and the debris leftover when they are harvested, which is called waste wood or woody biomass.
"There simply is nowhere near enough waste wood for all of these biomass projects that are popping up all over the place," said Marvin Roberson, a forest policy specialist with the Sierra Club in Michigan.
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