About how people's actions are reflected in the state of nature, they spoke with pupils of the secondary school named after R.Z. Sagdeyev in Buinsk town. The environmental lesson was conducted by specialists from the Zavolzhskiy Territorial Administration of the Ministry of Ecology and Natural Resources of the Republic of Tatarstan. Together with the children, ecologists examined the changes that occurred on Earth with development of agriculture and industry, and also discussed all the measures necessary to preserve it.