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(Answer: Building filters for air and water).

: Identifying actions that help preserve nature, such as the construction of water treatment plants (очистные сооружения), rather than just industrial development. (Answer: Building filters for air and water)

(Answer: Science of our common home, the Earth). (Answer: Building filters for air and water)

Based on educational resources like Infourok and official school portals, students might encounter questions such as: (Answer: Building filters for air and water)

Окружающий мир. Тестовые задания. 3 класс - Просвещение