==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 2018REEE 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;