The aim of this Special Issue is to collect original research articles, as well as review articles, on the most recent developments and research efforts in this field, with the purpose of providing new research directions. Potential topics include but are not limited to:

• Spatial localization and quantification of waste and byproducts for secondary raw materials production;
• GIS application for sustainable development of new systems;
• Clean and renewable energy production from wastes;
• Life cycle analysis to evaluate environmental impact of new systems for bioenergy production;
• Novel approaches to sustainable manage wastes and agro-industrial byproducts;
• Integrated approaches from anaerobic digestion and wastewater treatment;
• Sustainable reuse of agricultural wastes to reduce GHG emissions;
• Sustainable reuse of agro-industrial byproducts to reduce disposal costs;
• Estimation of willingness to pay for adopting sustainable techologies to produce energy from wastes;
• Green building materials.