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Book Description paperback. Condition: New. Paperback. Pub Date: 2021-02-01 Pages: 239 Language: Chinese Publisher: China Environmental Publishing Group Co. Ltd. This book introduces environmental protection knowledge around the four aspects of environmental protection themes of blue sky. clear water. pure land and garbage classification. including air and water . Soil. garbage classification and other knowledge points; combined with the actual experience of entering the childrens home in the environmental protection classroom. formed. Seller Inventory # NS060340