Research on Certification and Circulation Mode of Green Electricity Environmental Value Based on BlockchainMing Li, Wenyu Zhang, Meng Yang, Hongyong Liu, Jie Ren, Jiageng Dai and Shuailiang YaoE3S Web Conf., 385 (2023) 02004DOI: https://doi.org/10.1051/e3sconf/202338502004