Contact: R. Priyoko Prayitnoadi, S.S.T., M.Eng., Ph.D (+62-813-1206-9795); Last date for abstract submission: 31/May/2019; ICoGEE will invite several keynote speakers from academician from local and abroad which has deep knowledge and experience in sustainable energy and environment sustainability. All paper will be published at IOP Conference Series, indexed SCOPUS