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Environmental problems
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changes in the world's weather
Climate change
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things such as minerals, forests, coal, etc
Natural resources
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able to decay naturally and in a way that is not harmful
biodegradable
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a gradual increase in world temperatures caused by gases such as carbon dioxide
Global warming
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a long period when there is little or no rain:
drought
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A place where trash is buried
A landfill
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damage caused to water, air, etc. by harmful substances or waste
pollution
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the cutting down of trees in a large area
deforestation
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