==Proceedings: All accepted (Registered & Presented) papers of REEE 2019 will be collected in the E3S Web of Conferences (Open Access proceedings in Environment, Energy and Earth Sciences) and submitted for indexing by CPCI (Web of Science), Scopus and Ei Compendex. ==REEE 2018 REEE 2018 proceedings are published online (E3S Web of Conferences,Volume 80,2019) ==Committee: Conference Chair: Prof. Elmar Bollin, Offenburg University of Applied Sciences, Germany Program Chairs: Prof. Jin Su Jeong, Universidad de Extremadura, Spain; Prof. Jorge Loredo, University of Oviedo, Spain; Prof. Aurel Lunguleasa, Transilvania University of Brasov, Romania; Technical Committee: Prof. Silvia Brunoro, University of Ferrara, Italy; Assoc. Prof. Patrizia Beraldi, University of Calabria, Italy; Prof. Florinda Martins, ISEP, Portugal; Dr. LU Lin, The Hong Kong Polytechnic University, Hong Kong; Assoc. Prof. Magdalena Ligus, Wroclaw University of Economics, Poland; Assoc. Prof. Chong Wen Tong, University of Malaya, Malaysia; Assoc. Prof. Mohammad Salah, Hashemite University, Jordan; Asst. Prof. Cheung Sai Hung, Nanyang Technological University, Singapore; Assoc. Prof. Anas Al Tarabsheh, Abu Dhabi University, United Arab Emirates; Assoc. Prof. Issa Etier, Hashemite University, Jordan; Assoc. Prof. Mohammad Lutfi b. Othman, Universiti Putra Malaysia, Malaysia; Assoc. Prof. Jasronita bt. Jasni, Universiti Putra Malaysia, Malaysia; Dr. Tanzeel-ur-Rashid, UET Taxila, Pakistan; Prof. Kuo-Lung Lian, National Taiwan University of Science and Technology, Taiwan; Prof. Krishnamachar Prasad, Auckland University of Technology, New Zealand; ==Topic Scope (include but not limited ) Biofuels / Biofuel Cells Hybrid Energy Systems Hydropower Solar Energy Wind Energy Nuclear Energy Fission & Fussion Energy Policy, Planning & Management Energy Conservation Energy Conversion Fuel Cell Technology Renewable Energy Sources Solar Energy Water Energy Wind Energy Wastewater and Sludge Treatment Drinking Water treatment Energy Efficiency Water Treatment and Reclamation Industrial Wastewater treatment Wetlands for Wastewater Treatment Ecosystem Restoration Hazardous Gas Biofiltration Soil Restoration/ Phytoremediation Environmental Process Simulation Data Management and Statistics Environmental Remote Sensing Applications GIS for Environmental Assessment Air Quality Assessment Ecosystems Assessment Water Resources and Quality Assessment Water Pollution and Water Quality Control