ould increase its area along with the growth in its economy. In this case, such growth in territory did not occur. Second, there is great diversity within this region, which is unusual in that there is usually a certain intensity and functional uniformity in such a delimited region. There is a cultural diversity in Canada that has threatened the very existence of the country as a single political unit, and this diversity is found in this region. Third, the character of this national core is affected by its location within the larger core region for the entire continent, which means that the third theme is the relationship between the United States and Canada in terms of the way the national core is integrated into the continental core ("The National Core Region of Canada" 156). The manner of this industrial and urban growth varied within the core, and these differences relate to how the region is associated with the United States. Both portions of the core have urban-
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