Hello I like the idea but I would say Aurora is a part of Midgard I never heard of cha tbh but all I know as a member of TI is that Aurora is one of our closest allies and not an extension
I think it is a good suggestion to make it so that you need gasoline in winter for heating and the amount of gasoline used everyday can be decided according to the number population this will make the game more realistic as you will need to warm your population in winter so they don't die