What major water body became the center of the world trade by 1450

answer; andrew jackson approved nullification by signing it into law,and john calhoun opposed it saying it was unconstitutional;

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question - in the 1900s there were two competing views about the environment that often pitted industrialist and conservationist against one another. how were these two competing views demonstrated by the environmental policies of president roosevelt and president taft?

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a variant spelling of the word dote (british)

d) post-world war i