how do we know the physical limit of each steppes ?

[ourg]

I searched for 30 min didn't find where we can know where is the limit to go from on to another steppe

 

[WTH666444]

Click on the tab that shows the climate in your zone. In the bottom middle of the screen, a number of new, selectable map modes pop out, among them one showing the partition of the steppe's zones.