Question
Create a collage of natural changes that include both physical and chemical changes, such as the melting of ice, the rusting of metals, the decay of food, and the growing of plants.
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Types of sewage
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Point of origin
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Substances which contaminate
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Any other remark
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Sullage water.
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Kitchen.
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Foul waste.
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Toilets.
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Trade waste.
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Industrial and commercial organisations.
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| Tropical rainforest | Polar region |
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Hot and humid climate
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Penguin
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