Whilst I understand the literal translation of "terraforming" it's generally something I - and would assume most people - apply to making extra-terrestial planets habitable. So, I wouldn't really expect it in SimCity.
And for some reason saying SimCity just made me think of the old 80's protest song...
Sun City! And I'm not gonna play either!
"The horse I bet on was so slow, the jockey kept a diary of the trip." - Henny Youngman