Christmas Trees: Artificial Or Natural?

Dr. Neeta Ogden, an allergist in Englewood, N.J., blames artificial for the worst problems.

"The main reason is that people store them in their homes in the basement and attic, and those are places where they're going to attract dust and mold," Ogden said.

http://www.huffingtonpost.com/2011/12/07/christmas-trees-natural-artificial_n_1133240.html