Full Name: 2021 2nd International Conference on Clean and Green Energy Engineering Abbreviation: CGEE 2021 Welcome to join in the 2021 2nd International Conference on Clean and Green Energy Engineering (CGEE 2021)， which will be held in Istanbul, Turkey during August 7-9, 2021. For papers submitted to CGEE 2021, we offer the publications as following: Submissions will be reviewed both by the conference technical committees, and accepted papers will be published in E3S Web of Conferences (Open Access proceedings in Environment, Energy and Earth Sciences), which will be indexed by EI Compendex, Scopus, Google Scholar, CAS, DOAJ, CPCI (Web of Science), EBSCO, ProQuest, etc. A set of selected papers with extended version will be published into Journal of Clean Energy Technologies, which will be indexed by Inspec, Electronic Journals Library, Chemical Abstracts Services (CAS), Ulrich's Periodicals Directory, Google Scholar, ProQuest. The method for submitting your paper: By Easychair Submission system: https://cmt3.research.microsoft.com/CGEE2021 Please feel free contact with us: Jennifer Zeng (Conference Secretary) E-mail: cgee@iacsitp.com Tel:+86-28-86512185 For more information about international conferences, please visit our conference website: CGEE 2021 Website: http://www.cgee.org/