@KTSimCreationsI want to contribute in this problem.
To be clear, there are two ecofootprint metters:
1) Street Ecofootprint (the one you can see)
2) Lot Ecofootprint (this is hidden)
Lot eco footprint can be changed:
1) By buy mode objects
2) By build mode objects
While buy mode objects change the eco footprint of a lot progressively, the ones from build mode will change it immediately by adding points to that metter.
What happens with EA building from Evergreen Harbour is that most lots DON'T fulfill the quantity of build objects required to change the ecofoootprint of the lot immediately, so anytime you visit the lot, or travel from one world to another, the lots will lose their industrial eco footprint because they don't have "enough points" to have it.
And to be clear, the buy mode objects will change the lot ecofootprint throughout time. The more you have, the quicker it'll be, but this won't affect other lots unless you visit them and stay on them until the ecofoorprint change (which a found silly, honestly. It wasn't that hard to add an update service)