2021 6th International Conference on Green Energy Technologies (ICGET 2021) to be held on July 14-16, 2021 in University of Applied Sciences, Frankfurt, Germany. Conference Website: http://www.icget.org/ ICGET 2021 Shining Points: 1. Accepted papers submitted to ICGET 2021, after the peer reviewing process by at least 2-3 experts, will be published into Proceedings in the series with title "Advances in Sustainability Science and Technology" under Springer, The book series aims at bringing together valuable and novel scientific contributions that address the critical issues of renewable energy, sustainable building, sustainable manufacturing, and other sustainability science and technology topics that have an impact in this diverse and fast-changing research community in academia and industry.Or International Journal of Smart Grid and Clean Energy, all accepted papers will be indexed by CNKI, Google Scholar, Crossref, etc. and included in the Chemical Abstracts Services (CAS), CABI, Ulrich Periodicals Directory, Electronic Journals Library, Crossref, ProQuest. 2. Four Outstanding Professors have joined as Speakers. The first one is Prof. Marco Casini from SAPIENZA University of Rome.The second one is Prof. Hartmut Hinz from University of Applied Sciences, Frankfurt, Germany.The third one is Prof. R. J. Howlett from Bournemouth University, UK.The fourth one isProf. Zhijun Peng from University of Bedfordshire, UK. 3. Social event in Frankfurt, Germany on July 16, 2021. Paper Publishing: Accepted papers submitted to ICGET 2021, after the peer reviewing process by at least 2-3 experts, will be published into Proceedings in the series with title "Advances in Sustainability Science and Technology" under Springer, The book series aims at bringing together valuable and novel scientific contributions that address the critical issues of renewable energy, sustainable building, sustainable manufacturing, and other sustainability science and technology topics that have an impact in this diverse and fast-changing research community in academia and industry.Or International Journal of Smart Grid and Clean Energy, all accepted papers will be indexed by CNKI, Google Scholar, Crossref, etc. and included in the Chemical Abstracts Services (CAS), CABI, Ulrich Periodicals Directory, Electronic Journals Library, Crossref, ProQuest. Conference Venue: University of Applied Sciences, Frankfurt, Germany Submission and Contact Methods: Submission Methods: Electronic Submission System : http://confsys.iconf.org/submission/icget2021 E-mail: icget@cbees.net Tel: +852-3500-0137 (Hong Kong)/+86-28-88220101 (Chengdu) Conference Specialist: Ms. Alice Lin ICGET 2021 can provide a platform for academic communication in Green Energy Technology. For more conference information, please visit the conference website:http://www.icget.org/