An administrative investigation was initiated by environmentalists on the complaint of residents of Aisha and Uspenka settlements of Zelenodolskiy district of the Republic. Citizens reported on smell of burning in the air. The source of caustic smell was the furnace used to burn food waste. No excess was detected in the air samples taken by the specialists of the Central Specialized Inspectorate for Analytical Control of the Ministry of Ecology of the Republic of Tatarstan near settlements.