Most Eco Buildings have a negligible effect, while some even have a strong positive effect. Most Tycoon Buildings have a negative effect on the Ecobalance, but a rare few have a positive one. Think what you want about EA, but at least they keep their Origin stuff separate from Steam. Ecobalance (also Eco Balance) is a measure of the effect your buildings and actions have on the environment.
It may have changed, but back then, Uplay wasn't straightforward to set up, the client seemed more like a freaking social network, asking me to add friends before I could even redeem my game. That's like when you go shopping in your favorite bookstore and once you paid instead of handing you over your book they give you a voucher for an ebook on amazon.
ANNO 2070 VS 2205 CODE
It was one of the first games that I bought on Steam, a few years ago, imagine my surprise when instead of a game I got a code for another game client. It shares the same forward looking sci-fi trappings as Anno 2070, while previous games were based on historical settings. Up to this day they don't even mention the fact that Anno 2070 requires Uplay in the Steam store (they only mention Tages, which often seems to cause trouble for people as well). Still why not get the game directly for Uplay then, so you can just avoid running two DRMs at the same time? In my opinion they shouldn't even sell it on Steam if it requires Uplay. Guess it's not so much of an issue, once it's set up, working and if you use it regularly. As I said, I also had trouble with certain patches and the client not starting up as it should. If you use it rarely, like i do, it also takes likes half an hour patching the Uplay client first.