Here are the answers to the comparisons and questions you've provided:
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Compare trading between the United States and Mexico:
- Answer: Mexico relies heavily on trading with the United States, but the United States does not rely heavily on trading with Mexico.
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Summarize travel between the United States and Mexico:
- Answer: Mexico is the leading foreign destination for U.S. travelers, and the United States is the leading foreign destination for Mexicans.
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Compare Pittsburgh in 1950 to Pittsburgh in 2010:
- Answer: By 1950 the population of Pittsburgh was about 675,000; the population of Pittsburgh was about 305,000 in 2010.
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Result due to environmentalism in the Greater Yellowstone Ecosystem:
- Answer: Bison population rebounded.
This selection should comprehensively address all the comparisons and questions posed.