None of them are documented as eco-damaging, but I'm out of options here. There are 2 things however that I do and I think they might be related: I'm not sure what causes it, because I checked the Help and I don't have anything that is documented to cause it. What's really interesting is that sometimes I get Eco damage mid-turn! Insane amounts! All of my cities are surrounded with forests.in fact, the only terraforming I do (apart from roads) is planting trees. I have all the base facilities that help Ecology and none of the ones that damage it (like a Genejack Factory). I have been getting a lot of Ecological Damage in my cities for no apparent reason.
