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Christmas tree syndrome could trigger your allergies or asthma
Is it possible to have allergies from the Christmas tree? - Quora
Christmas Tree Making You Sick? Here's What to Do
Christmas Tree Watering - How To Get A Christmas Tree To Take Up Water
Live Christmas Trees Affect Indoor Air Chemistry, NIST Researchers Find
Christmas tree syndrome not so pleasant
National Christmas Tree - The White House and President's Park (U.S. National Park Service)
Midwest Indoor Air Quality
Christmas tree syndrome' warning as festive season arrives - ABC News
How To Prevent Your Christmas Tree Allergies