Pollution Workaround

[Fyron]

Captain Kwok said:
The main problem is that the values for unhappiness are too large (i.e. at least 1% per facility per turn) so the population gets angry really quickly with even just 2 or 3 facilities.

You can have them build a system happiness facility with decently high priority to offset the first few negative facilities. Perhaps give space ports a 1% system happiness ability for the AI? Another option would be reduced rate production facilities that do not cause unhappiness. They should be less productive overall than normal facilities, of course. The AI could build the first two miners of this type, then a planet happiness facility, then some normal, anger-causing miners.