Scottsbluff is a city in Scotts Bluff county, that is part of what region of the United States that is covered in prairie, steppe, and grassland, and lies east of the Rocky Mountains?
Great Plains: The Great Plains (sometimes simply "the Plains") is the broad expanse of flat land (a plain), much of it covered in prairie, steppe and grassland, that lies west of the Mississippi River tallgrass prairie states and east of the Rocky Mountains in the United States and Canada.
i don't know