I don't know whether my civ has some SERIOUS bugs or such things are normal. In GOTM VII Smash build many air bases and made even mountains producing food this way! I've never seen this before. Are there any other tricks like that?
Also acts as railroad
Does the "airbase RR" also act as a railroad in terms of trade route...
Does the "airbase RR" also act as a railroad in terms of trade route bonuses (i.e. the bonus for having two cities linked in the shortest possible route by RR)?