Additional Information > Population
Population growth is related to the level of buildings and their additional phases.By constructing/upgrading buildings your city's population will increase.
You can increase the speed of construction/upgrade by increasing the level of the city council.
Alternatively, by spending 3 gold coins you can use the special feature to complete the construction/upgrade of a building instantly.
As your population increases the level of crop consumption will also rise.
Players can see how much their total crop consumption will rise when constructing/upgrading a building or training troops next to the icon:
The total consumption of wheat throughout the city is show on the sidebar: