carbon dioxide , , coral , , dugong , , ecosystem , , endangered , , extinction , , habitat , , oxygen , , toxic , , resident , , carbon footprint , , single-use products, , participate in activities, , protect the environment , , release toxic substances , , eco-friendly products , , climate change, , cut down trees, , pick up rubbish , , water pollution, .

UNIT 7 : ENVIRONMENTAL PROTECTION - BASIC

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