美国消失的风景：高草草原

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Prior to Euro-American settlement in the 1820s, one of the major landscape features of North America was 240 million acres of tallgrass prairie. But between 1830 and 1900 -- in the **** of a single lifetime -- the prairie was steadily transformed to farmland. This drastic change in the landscape brought about an enormous social change for Native Americans. In an equally short t...

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