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| an area, often covered with sand or rocks, where there is very little rain and not many plants |
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| to damage something so badly that it cannot be used |
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| land that is used for or is suitable for farming |
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| to spoil or destroy something completely |
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| to cover or reach a wider or increasing area, or to make something do this |
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desertification (n) /dɪˌzɝː.t̬ə.fəˈkeɪ.ʃən/ |
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| the process by which land changes into desert, for example because there has been too much farming activity on it or because a lot of trees have been cut down |
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| damage caused to water, air, etc. by harmful substances or waste |
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| to become or to make something become smaller in size, amount, degree, importance, etc. |
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| dry dirt in the form of powder that covers surfaces inside a building, or very small dry pieces of soil, sand, or other substances |
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| to behave towards someone or deal with something in a particular way |
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