The Columbian Exchange caused population growth in Europe by bringing new crops from the Americas and started Europe's economic shift towards capitalism. Colonization disrupted ecosytems, bringing in new organisms like pigs, while completely eliminating others like beavers.
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Its stated purpose was to "change the level, and preference system for admission, of immigrants to the United States, and to provide for administrative naturalization." The law increased annual limits on immigration to the United States, revised visa category limits to increase skilled labor immigration, and expanded
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The politics of Saudi Arabia takes place in the context of a totalitarian absolute monarchy with Islamist lines, where the King is both the head of state and government.
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Germany is correct i think