Awesome idea. None at all for me. The CO2 emissions for just having a unit are insane. Just from having one Ironclad sleeping in a port you can become the worst polluting member, getting diplo malus at a period of time when no one cared about coal pollution, but complained about horsesh*t in the streets. Agree! Yes, but if you decrease the amount to 40 strat. resource they will offer the same price. So do it.