The world needs a new source of energy, an unspillable source.

Can woodchips be considered a biofuel or renewable resource?

According to this article I read, a prison in Nevada is using woodchips from surrounding forests to heat and power it. The plus side is that using forest wastes will help the forest thrive instead of thin out.

But are woodchips are renewable resource, and can it be considered a biofuel?
http://www.biofuelprocessor.com/nevada-renewable-energy-prison/