I have been worrying about resources. The whole interface is still confusing for me, so I haven't been able to figure this out: Can I trade my last available resource away, e.g. if I have one source of iron, can I trade it away?
Or in other words, when it says "1 available" on the diplomacy menu, does it mean that it's one, or one extra in addition to what I am using?
Or in other words, when it says "1 available" on the diplomacy menu, does it mean that it's one, or one extra in addition to what I am using?