Ecology of the Western region in Kazakhstan: state and main directions of improvementТurgai Alimbaev, Zhanna Mazhitova, Bibizhamal Omarova, Kuralay Yermagambetova, Karlygash Atanakova and Aiman ZhumanovaE3S Web Conf., 217 (2020) 04006DOI: https://doi.org/10.1051/e3sconf/202021704006