Today, employees of the Central Territorial Administration and specialists of the specialized inspection of analytical control of the Ministry of Ecology of the Republic of Tatarstan, together with representatives of the Ministry of Emergency Situations of the Russian Federation for the Republic of Tatarstan, held an environmental campaign to restore oxygen balance at the Nizhny Kaban Lake in Kazan. Together, more than 100 holes were drilled on the lake, as well as measurements of the oxygen content in the water body were made.