Not as bad as a fake tree:
[A]n artificial tree is made of polyvinyl chloride (PVC), can never be recycled, and eventually ends up in a landfill after you’ve gotten your years of service out of it. A fake tree is used an average of 6 to 10 years before being dumped for a newer model. … Christmas tree farmers are leaders in conservation agriculture. Their product emits healthy oxygen during its 15 or so years of growing, requires little to no supplemental irrigation, and thrives in tough terrain that is otherwise unsuited for agricultural crops.
The Dish 