A Christmas dilemma: real or fake? Which is the greenest? While an artificial Christmas tree may seem the greenest because it's reusable, it's the loser here. Most fake trees are made from petroleum sources and are manufactured overseas, using loads of fuel to ship halfway around the world to your home. A real evergreen tree is fully biodegradable, grown on land that might otherwise be used for development and 100 percent recyclable. If you can, go real.