behave , act in a certain way, waste, unwanted materials or substances that are left after you have used something, carbon dioxide, the gas produced when animals breathe out, challenge, something difficult that tests strength, skill or ability, chemical, a substance used in chemistry, climate change, a permanent difference in the Earth’s weather conditions, consume, use things, like energy, time, food, floods, a very large amount of water that covers an area, environmental damage, which is usually dry, global warming, harm caused to the Earth, natural disasters, a sudden event which causes great damage or suffering, which was not directly caused by people, e.g. flood, storm, earthquake, natural resources, things that exist in nature and can be used by people, e.g. oil, trees, etc., recycle, process used objects or materials so that they can be used again, reproduce, when an animal or plant produces young animals or plants, run out, use all of something and not have any more left.

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