'''Urban''' areas are defined as those areas dealing with [[city|cities]] or industrialized conditions.
'''Urban''' areas are defined as those areas dealing with [[city|cities]] or industrialized conditions.
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Over time the makeup of the earth has become more urban. In the United States, while urbanization has increased over time, there has also been a trend towards moving away from urban areas to suburban or rural locations since urban areas tend to have more difficulties with [[crime]].
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Over time the makeup of the earth has become more urban. In the United States, while urbanization has increased over time, there has also been a parallel trend towards moving away from urban areas to suburban or rural locations since urban areas have many issues from crowding, to [[crime]], to pollution.