Divided the United States into time zones.
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Divided the United States into time zones.
divides the united states into time zones - apex
more people owned their own cars
The Great Northern railroads enabled the railroads to earn money by hauling goods both east and west, instead of lumbar like other railroads
a faster to transport goods, because we found a way to produce more goods, so we just needed a way to ship them to places. railroads was the answer.