Environmental safety in the countries bordering Kazakhstan in the context of sustainable developmentZeinegul Yessymkhanova, Shakizada Niyazbekova, Zhanar Dauletkhanova, Nurdin Dzholdoshev and Tamara DzholdoshevaE3S Web Conf., 244 (2021) 01016DOI: https://doi.org/10.1051/e3sconf/202124401016