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Plains Are Small: Within these limits, the plains extend, on the average, about 400 miles (640 km) eastward from the Rockies, and their north-south length is about 1,500 miles (2,400 km). There is also some physiographic justification, however, for including in the plains area the Wyoming Basin, centered about Casper, Wyo., and the Bolson de Mapimi, in Chihuahua and Coahuila, Mexico.
It was the opening up of the American plains in the nineteenth century that provided the real impetus for mechanization. The plains could grow millions of tonnes of wheat to feed the booming population of industrializing Europe, but local labour was both scarce and expensive. By 1850 a reaping machine was already in use. just before a steam engine was produced to apply power to ploughing, harvesting and threshing.
Attica, with its light soil and Mediterranean climate, is suitable for the culture of the olive; its cereal-producing plains are small; its indented coast is well wooded with the small Mediterranean pine. The Athens-Piraeus metropolitan area, linking plain and coast together, is by far the largest center of population in Greece. The political and cultural capital, it lies at the focal point of seaborne commerce and overland traffic between northern Greece and the Peloponnesus.
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