[Jubala]

To further elaborate on the subject, say you have a new colony producing at 2000. Emergency puts it at 4000 and slow at 1000. 10 years in normal mode = 20000, 10 years of which the first five is emergency and the next five is slow = 5*4000 + 5*1000 = 25000. Meaning you get 5000 extra production points. Could come in handy if you are building expensive facilities like space yards or big badass ships. Be careful though. Don't do emergency for too long as that slow build can kill you if your enemy come calling at the wrong time.