List of Articles جمع آوری پسماند Open Access Article Abstract Page Full-Text 1 - An intelligent Hybrid Algorithm for Urban waste Collection Problem heydar Lotfi Babak sadeghi Open Access Article Abstract Page Full-Text 2 - Solid wastes separation considering environmental economic aspects: technical vs. traditional system (case study: Tehran district 20) Hassan Karimzadegan Seyed Masoud Monavari Reza Naghavi Afsaneh Hassani Open Access Article Abstract Page Full-Text 3 - Evaluation and optimization of the collection and transportation system of solid waste management in Zanjan with GIS application Azadeh medhat Masood Monavvari Amir Hossein Javid Akbar Eslami Mohsen Ahad negad