Pollution will cause sea level rise and desertification. Be careful that your factory does not destroy the entire planet.
Mods introducing new content into the game.
Map generation and terrain modification.
Will this put a water tile where a tile, wall or entity exists? Regards, ~B
Yes, no, yes.
Water will expand unless you have dykes (walls) built to stop it. Water pumps count as walls for the purpose of stopping expansion.