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the human population is not very high in the rocky mountains, with an average of four people per square kilometer and few cities with over 50000 people. however, the human population grew rapidly in the rocky mountain states between 1950 and 1990. the 40 - year statewide increases in population range from 35 percent in montana to about 150% in utah and colorado. the populations of several mountain towns and communities have doubled in the last 40 years. jackson hole, wyoming, increased 260%, from 1244 to these residents, in 40 years. [4]geology
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