So basically, when they get a natural resource token, is it iust a permanent trade token? When they spend it as a trade token, they can just place it back on a card as another trade token? Or do they lose the ability to use it as a resource if it's on a card?
A natural wonder token can be spent once per turn as a resource. America's power seems to be that you place it on a focus card and can spend it EITHER as a trade token to amplify the card ability or as a resource (as usual). However, you can not relocate the token to another card until it is spent and it can only be spent once per turn.