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Why is there a small population in the east and west of the United States?

The eastern part of the United States has a subtropical temperate climate with moderate rainfall on the windward slope and a tropical desert climate in the west. The terrain in the east is much lower than that in the Rocky Mountains in the west. It is flat and suitable for human habitation.

American immigrants mainly landed in the East from Europe via the Atlantic Ocean. Before liberation, 13 colonies were all located on the eastern coast. People's minds are relatively open, and many heavy industries are distributed here, while the western region is open late, the environment is bad and its development is lagging behind.