The impact of the environmental crisis on the purchasing power of consumers Askar Smagulov, Yerzhan Zhatkanbaev, Jumabek Tumbai, Shynar Abdikul, Kymbat Muratbekova and Asylbek Agymbay E3S Web Conf., 159 (2020) 03005 Published online: 24 March 2020 DOI: 10.1051/e3sconf/202015903005