Reason one why you should buy fake Christmas tree, is because fake tree doesn't produce oxygen like real trees so the more you cut down trees the less oxygen there will be.
Reason two cutting down trees can take away homes from wildfire. An example of this statement is around 25 millions Christmas trees are cut down.
Reason three is that real Christmas tree can cause allergic reactions. For example it can cause sneezing, watery eye and itchy
nose.