Yes, if you have no weapons factory/airstrip you can't make any more harvesters.
If you lose your refinery you don't get the 300 on harvester incoming, but still get ur 2 credits every second or so.
WAIT, common sense tells me you lose the 2 credit a second with refinery, but vague memory tells me otherwise. I think u do lose the 2 a credit
If you lose your power plant you can still get the 300 on harvester incoming, but only get 1 credit every second or so, instead of 2
I believe Westwood also said that spawn times and vehicle build times are twice as long without a power plant, but that doesn't matter much anyways[ April 12, 2002: Message edited by: H3liCat ]