This Special Issue focuses on the characteristics of pollutant generation and discharge in the process of solid waste/hazardous waste generation, discharge, disposal and resource utilization. It also focuses on the latest progress in solid waste/hazardous waste harmlessness, reduction and recycling technology, energy conservation and environmental protection, and on the innovation and development of a solid waste/hazardous waste system, technical system, market system, and regulatory system, and discusses the latest innovative technologies and management practices applied in this field worldwide.