The development of renewable energy and state policy in improving energy efficiencyShakizada Niyazbekova, Saltanat Yerzhanova, Yuliya Tyurina, Mirlan Abilmazhinov, Кarl Кyazimov and Evgeniya SmernitskayaE3S Web Conf., 244 (2021) 10059DOI: https://doi.org/10.1051/e3sconf/202124410059