Task: Question Generation
Input (English): The Earth contains about 434 billion cubic meters of growing stock forest, 47% of which is commercial. As an abundant, carbon-neutral renewable resource, woody materials have been of intense interest as a source of renewable energy. In 1991, approximately 3.5 cubic kilometers of wood were harvested. Dominant uses were for furniture and building construction.
Output (English): In addition to being carbon neutral, what other adjective describes wood that makes it compelling as a renewable energy source?