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7 Cards in this Set
- Front
- Back
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transportation
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the business of carrying people or goods from one place to another
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hub
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a major center of activity
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research
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studying something carefully to learn more about it
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communication
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the exchange of information
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ethnic group
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people who share the same culture
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planned community
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a place to live that is mapped out ahead of time
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pollution
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anything that makes something impure or dirty
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