I'm in my first GS game and I built an Ironclad, upgraded a caravel armada to an Ironclad armada, I have maybe 2 factories. I have purposely not built a Coal Power Plant. I discovered I am the leading cause of CO2 in the world at 103 points while the world is at 205. Do military units add to CO2? Do unpowered factories? Can someone give numbers when guides everywhere use phrases like "Oil Power Plants produce a moderate amount of CO2"? Are there ratios Coal is 2:1, Oil is 1:1, and Uranium is 1:2?