The Blight's much worse, and this world doesn't seem to have it. There's no Archdemons here to cause it either, and no Darkspawn, which makes Grey Wardens like myself a bit useless. The pollution isn't as bad everywhere - out in the countryside, it's a lot more tolerable.
London's a nice enough place, as long as you're careful. If you'd like, I could come and show you around, help you find out who you've replaced in this world.