[Arkcon]

Originally posted by Ruatha:
If I build an climate control 1 facility (Tech 1) can I upgrade it up to tech 7 or must I scrap it after tech 3 and build another kind of facility ?

No, you can only upgrade Climate Control Facility, Value Improvement Plant, and Atmospheric Modification Facility from I, II, III.

They are separate facilities doing different things so you build and upgarde separately.

That's important, cause conditions and value might not be at maximum when you got Atmosphere modifiers -- you wouldn't want them to disapper before they were done.