polluted, to make water, land and air dirty, clean, not dirty, safe, harmless / not dangerous, dangerous, can kill or damage something or someone, recycle, to change waste materials so that they can be used again, plastic, a very common light, strong substance produced by a chemical process, climate change, the world’s weather is becoming warmer, global warming, the slow increase in the temperature of the Earth, environment, the natural world, including the land, water, air, plants and etc., ecology, the study of the environment and the way that plants, animals, and humans live together

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