Full name: 2021 4th International Conference on Green Energy and Environment Engineering(CGEEE 2021) Abbreviation:CGEEE 2021 2021 4th International Conference on Green Energy and Environment Engineering (CGEEE 2021) will be held during July 22-24, 2021, Jeju Island, Korea. Conference Website: http://www.cgeee.net/ CGEEE 2021 Shining Points: 1. For papers submitted to CGEEE 2021, after the peer reviewing process by at least 2-3 experts, all the accepted papers will be published into E3S Web of Conferences (Open Access proceedings in Environment, Energy and Earth Sciences), which is indexed by EI Compendex, Scopus,Google Scholar, CAS, DOAJ, CPCI (Web of Science), EBSCO, ProQuest,et al. 2. We have invited the outstanding Prof. Jae K. Park from University of Wisconsin-Madison, USA and Prof. Eng. PhD Marco Casini from SAPIENZA University of Rome, Italy to join our conference. 3. One day visit in Jeju Island, Korea will be arranged on July 24, 2021 Paper Publishing: For papers submitted to CGEEE 2021, after the peer reviewing process by at least 2-3 experts, all the accepted papers will be published into E3S Web of Conferences (Open Access proceedings in Environment, Energy and Earth Sciences), which is indexed by EI Compendex, Scopus,Google Scholar, CAS, DOAJ, CPCI (Web of Science), EBSCO, ProQuest,et al. Submission and Contact Methods: Submission Methods: http://confsys.iconf.org/submission/CGEEE2021 E-mail: cgeee@cbees.net Tel: +852-3500-0137 (Hong Kong) +1-206-456-6022 (USA) +86-28-88220101 (Chengdu) Conference Specialist: Ms. Echo CGEEE 2021 can provide a platform for Green Energy and Environment Engineering. For more conference information, please visit the conference website: http://www.cgeee.net/