On September 21, the Central Saturday voluntary clean-up day will be held on the Izumrudnoye Lake. The program participants - Andrei Agarkov, Deputy Chairman of the regional branch of the Russian Geographical Society in the Republic of Tatarstan, and Olga Artemyeva, Head of the Department of Environmental Education and Interaction with Public Organizations of the Ministry of Ecology and Natural Resources of the Republic of Tatarstan, will tell what awaits the participants of the campaign. Guests of the studio will share interesting findings and results of the Saturday voluntary clean-up days.