Thomas R. Miles has been the principal of T.R. Miles, Technical Consultants, Portland, Oregon, since 1997. He is an expert in combustion and gasification of biomass fuels such as wood, straws, stalks, and manures. Since 1975 he has designed, developed, installed, and tested systems for processing wood, agricultural, and urban residues, materials handling, pollution control, biomass energy, and biochar. He has sponsored and hosted internet discussions of biomass energy and biochar since 1994. He is a board member of the International Biochar Initiative and Executive Director of the US Biochar Initiative.