Regulation of environmental protection measures in the Caspian Sea region Sergey Yekimov, Oleg Bavykin, Elena Kuznetsova, Roman Kucherenko and Dmitriy Kucherenko E3S Web Conf., 262 (2021) 03002 Published online: 24 May 2021 DOI: 10.1051/e3sconf/202126203002