Fake, pre-lit tree. Bad allergies and asthma.
I have to admit, having an artificial tree makes me question the whole tradition of putting up a tree. Every year I look at it and think, "WHY do we put an evergreen tree in the middle of our living room and decorate it with a bunch of metal, plastic and glass." Doesn't make a lot of sense to me. But then again, neither do most of our traditions. By the time Christmas morning comes around I think it is beautiful. This year we're decorating the tree with all homemade crafts (paper chain, popcorn garland) and natural looking ornaments (birds, bird nests, pinecones, etc.)