changing earth

[kalafat]

I played earth scenario. When the population of the my civ increased so much (>30m) and number of cities came close to the limiting value, JNorth America merged to the antrica, having terrains that gave hundreds of food, science, etc. per turn. The problem was that the city also produces also pollution, and 5-6 settlers couldn't come over this.

I played civ1 so much, and I encounter this situation consistently.

Is there anyone who can explain the reasons of this situation?

 

[Matrix]

I suppose it's a bug. It happened to me too once IIRC, but I didn't (wanted to) use that land.

 

[Lazarus Plus]

I've seen Map freak-outs but never anything like what you are describing, and I've gained WAY more pop than that. (Entire planet colonized to point of maximum cities, each city with at least a million pop.)