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In the late 1800s and early 1900s many areas in the mountains and riverbeds of several Mountain and Pacific states were permanently damaged ecologically by what commercial activity? " "
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In the late 1800s and early 1900s many areas in the mountains and riverbeds of several Mountain and Pacific states were permanently damaged ecologically by what commercial activity? " "

User Xiaoguo Ge
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1 Answer

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The Union rail road and the pacific rail road companies were in a race to finish their half first and had to go through mountains
User Ajay M
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