In addition the EPA rules clarified permissible wood waste for burning in a boiler:
The Biomass Thermal Energy Council issued a statement:
"The EPA's final standards look to balance health concerns, technological achievability, and compliance costs in a way that will pull our industry forward. Reasonable and attainable standards for emissions and efficiency allow the biomass thermal industry to offer a viable alternative to fossil fuels that can be adopted by the public and supported by government. BTEC is committed to a dialogue with the EPA and the U.S. Department of Agriculture to facilitate continuous improvement for community-scale biomass boilers."
For more see NY Times and Biomass Magazine