What causes air pollution?
factories cause air pollution.
What causes air pollution?
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What causes air pollution?
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What causes air pollution?
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What causes water pollution?
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What causes water pollution?
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What causes water pollution?
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What causes land pollution?
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Where should we put our trash?
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What causes noise pollution?
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What causes noise pollution?
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What causes noise pollution?
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What causes light pollution?
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What causes marine pollution?
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What are the effects of an oil spill?
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What cleaning supplies do you have in your house?
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