★=Publication=Accepted full papers will be collected in CEES 2021 conference proceedings to be published as a volume of IOP Conference Series: Earth and Environmental Science (EES) (Online ISSN: 1755-1315 | Print ISSN: 1755-1307), which are to be submitted for indexing to Ei Compendex, Scopus, IET etc. major databases. ★=Committee=Conference Chair:Yongsheng Ma, University of Alberta, Canada Program Chairs:Songgang Qiu, West Virginia University, USA;Guanghsu Chang, Nanjing Institute of Technology, China. ★=Keynote Speakers=Prof. Udaya K. Madawala, IEEE Fellow, The University of Auckland,New Zealand;Prof. Ridha Ben Mrad, P.Eng., FCSME, University of Toronto, Canada. ★=History=*CEES 2019 / July 27-29, 2019 | Nanjing, China*CEES 2018 / July 25-27, 2018 | Vancouver, Canada