Sofia is the capital. Hope this helps you.
Well at first people named things for how they looked, for example, the heart has a heartlike shape. Eventually scientists started using Greek and Latin roots and such in names to prevent confusion.
E since a lot of taller buildings have a lot of steel in them before being covered in other material
It allows the Government of the United States to "make all laws which shall be necessary and proper for carrying into execution the foregoing powers, and all other powers vested by this constitution."
Production of more food--the system allowed for more food to be produced which fed the workers in an industrial economy.
The 'four-field system' rotates crops between the 4 fields no longer needing to keep one empty because one of the crops would replenish the field with nutrients while the others take nutrients away from the fields. <span />
