In version 0.8 they could reduce the time of construction for the edificios. Some take a very long time to be concluidos, what it compels the player to losing many turns the wait of determined edificios to be able to give you sweat them beneficios. Former: the mines of second nivel take 29 turns them to be concluidas or either more than 4 years the wait to have effect in the economy of factions, sory for my English