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NAME:
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ANSWER THESE QUESTIONS USING THE GRAPH:
1. The largest portion of Earth's land is
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2. The smallest portion isIMAGE imgs/land08.gif IMAGE imgs/land07.gif on the surface.

3. Which type of land could be used with irrigation? ________________________

4. As population continues to grow, why must cities plan their expansion carefully?

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6. If 50% of the polar areas melted and all ofthe land was usable, what would be the total percent of usable land?
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