This book consists of two parts, the first of which focuses on combustible solids, and the second on the industrial position concerning these materials. It includes practical data and information on all biomass sources, from woodchips to sewage sludge, as well as mixtures. Biomass materials are rapidly becoming a fundamental energy source, and their consumption will surpass that of fossil fuels in the near future. The risk of explosion of biomass dust materials can lead to massive economic and human losses worldwide, and applies to every facility that produces, processes or handles these materials. A better understanding of the risk could help reduce the number of accidents; until now, however, no book has been published on the subject. This book is the first to gather the latest information, both from the authors and from other researchers, while also providing explanations and clarifications of how to correctly determine the most relevant parameters and use them to ensure safer environments. It was written in clear, straightforward language to make it accessible for a broad range of readers, from students to senior researchers.