The closed-cycle economy, energy efficiency and environmental safety were discussed today at the Kazan Expo Exhibition Center as part of the Tatarstan International Forum on Energy Efficiency and Ecology - 2021. The section organized by the Ministry of Ecology of the Republic of Tatarstan was attended by Deputy Minister of Ecology and Natural Resources of the Republic of Tatarstan Ayrat Shigapov, as well as representatives of science, universities, enterprises and organizations of the republic and Moscow.