I've got it set up correctly, with a target specified for Safe Greenhouse Gasses. Could it perhaps have something to do with a low political stability (something I've just discovered is going on there)?
That affects production like construction of ships and buildings. I think that terraforming is part of that as well. Which means yes, if they are ground constructed terraformers. No idea if ships are affected by the planets production modifiers. I believe they are kept and operate separate from the colony though and just add their value to the end of the result of the colony's output.
If I'm wrong I'm sure I'll be put in my place by the experts.
