How much waste paper does it take to save one tree and what harm do discarded batteries cause to the environment? These and other questions were answered by specialists of the Central Territorial Administration of the Ministry of Ecology of the Republic of Tatarstan in kindergarten No. 181 of Kazan. Ecologists held an eco-lesson here called "The enemy of nature is garbage." The goal is to instill in children a responsible attitude to nature, to increase ecological culture and to teach them how to handle waste competently. The guys learned how to properly sort garbage, how many years it decomposes and what things are made from recycled waste. To consolidate the material obtained during the lesson, an exciting quiz was held. The kindergarten children, divided into three teams, solved puzzles, collected puzzles and answered questions. For the development of environmental education, the children were given coloring books.