What industry stimulated the creation of "time zones" in the United states

Eastern, Central, Mountain and Pacific

Explanation:

because On November 18, 1883, America's railroads began using a standard time system involving four time zones, Eastern, Central, Mountain and Pacific. Within each zone, all clocks were synchronized hope it helps ask if you need anything else

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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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