Ah yes, the feature everyone asked for. I don't think you know full well what you're getting yourselves into.
Keep the Chemical Plants away from urban areas or something bad might happen. You've been warned :)
Of course, not only Pollution is what we've been doing. Get ready for a new tutorial and helper system, major performance upgrades, and much more!
https://youtu.be/H_Ry-RhSBGU
All the changelogs (many, many things are different):
https://steamcommunity.com/app/671440/discussions/4/2789318172109558544/
https://steamcommunity.com/app/671440/discussions/4/2789318172120908560/
https://steamcommunity.com/app/671440/discussions/4/1744483505469570624/
https://steamcommunity.com/app/671440/discussions/4/1743358239830596458/
As usual, new saves are required, so if you want to continue on the A8.2 patch, use the "PreviousBuild" branch