Yep, also the Professor knew what Pine-needles smell like when Fry used the smell'o'scope in "A big piece of garbage".
I guess that they think the original christmas - pine tree is extinct, since they don't even know what it was like, but I could be wrong there.
btw. Even our Administrator SlimmyCGEF asked that question 5 1/2 years ago. In fact it was the 6th thread that has been started in the "Re-check/Weird Scenes" section. Tree's down!!
Another thread covering this is nearly as old : Xmas Trees Really Gone?
There might be even newer threads about it
Welcome to PEEL, Jamrams
you saw that most of the times you open a thread someone comes around and says it has been done before. Sadly it is that way that if there is already an existing thread for a topic that the older one should be used, while the newer one normally gets closed.
Result is that searching for the old one is much easier in the first place.
That is one of few general guidelines you should follow here (and in most other messageboards as well). If you are interested, you should be, you can find more tips to get along here in our FAQ, the PEELers' FAQ
afterall, enjoy your stay here.