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These are large numbers for such crucial resources , however , they are limited . Because these resources are limited , so are the numbers of goods and services we produce with them . Combine this with the fact that human wants seem to be virtually infinite , and you can see why scarcity is a problem . If you still do not believe that scarcity is a problem , consider the following : Does everyone need food to eat ?
Please check all the words that can be used instead of the target word in the same context. Note that the morphology of the target (third person singular, past tense etc.) is considered to be applied to the candidate automatically in the process of paraphrasing.