On polution tiles in civ 3 itself, it's basically a non-issue. By then almost all occurances of polution will be close enough to the rail network to clean up all in one turn. Just costing you a few turns doing under tasks (probably railroading or converting irrigation to mines)
The other thing that can be an annoyance is if you had a city with exactly enough net production to build an improvement / military unit in even turns. The thing to do in that case is to build something that you have a slight surplus in shields for so when the polution occurs, it doesn't slow down production.
The other thing that can be an annoyance is if you had a city with exactly enough net production to build an improvement / military unit in even turns. The thing to do in that case is to build something that you have a slight surplus in shields for so when the polution occurs, it doesn't slow down production.
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