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 suchas 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 about improved cooking stoves, biomass energy, and biochar since 1994. Mr. Miles has experience in biomass and bioenergy projects in many countries. In Africa, he has studied and worked in Tunisia, Mali, and South Africa. He speaks Portuguese, Spanish and French. Mr. Miles is chairman of the board of the International Biochar Initiative and Executive Director of the US Biochar Initiative.