What started off as a search for some festive holiday billboards to post here turned into this recap of outdoor ad campaigns by Treetopia. Green Christmas trees are so 2009. Why not intergalactic black or lemon-lime sublime or rainbow? Treetopia wants you to use your tree to make a statement. And they carry this concept through to their advertising by playing up social topics like homosexuality or local events like the Ohio State football scandal. They could have done something dull like “80 Different Colors to Choose From.” Instead, they could be single-handedly changing our perspective on what makes a Christmas tree a Christmas tree. And there’s no other medium that can do that faster than outdoor.