Did I say planetary engineering? Silly me, what I meant to say was umm Shrines, yeah that's it. Be sure and fill your planets with nature shrines on every planet and scrap everything on your final turn. You people will love you for it, and tha's what really counts, right?
Yep, since the game doesn't warn you that other nature shrines are in the system, you must be getting the benefit from all of them! No need to check this yourself, truuuust me, heheheh.
-Drake