I added 3 new resources for upgrading and for creating consumable stuff like rocket-fuel. The ressources are randomly generated on the map and can be easily hauled and stored. Every high-tiered building will need one of those resources. The tier 2 industry factory, for instance, will need 3x carbon. The tier 3 industry factory will need additional 5x carbon. Rocket-fuel is made from oil and is consumed every time you attack enemies with rockets. Rockets can be upgraded as well. In lategame its possible to mount rockets with nuclear warheads.