The question From whence (i.e. from where) the wood? has never been more relevant. This report aims to improve the social and environmental conditions under which solid biomass is produced. By examining the degree of biomass supply chain transparency provided by the six largest individual consumers of solid biomass for electricity generation in the Netherlands electric utilities E.ON, Eneco, EPZ (DELTA), GDF Suez, RWE/Essent, and Vattenfall/Nuon the report aims to increase the public and political pressure on electricity companies to take responsibility for ensuring that minimum social and environmental standards are respected throughout the biomass supply chain.