Strong and steady winds are ideal for power generation. Wind is powered by a temperature differential, is slowed by obstructions and is generally stronger at high altitudes. Plains have high winds because they have few obstructions. Mountain passes have high winds mostly because they're at high altitudes, and the pass acts as a funnel and partly because of the temperature differential between the differently sunlit sides of the mountain. Coasts have high winds because water has few obstructions and because of the temperature difference between the land and the sea. The ocean, since there aren't any obstructions for a large distance around, also generally has high winds. Within an area, they're will be wind variations due to the local topography; so often the winds are monitored and modeled before wind generators are installed.
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