I think my favorite thing about Christmas is having a real tree in the house. I know that seems redundant since I live amongst pine and fir trees year-round, but it's like having the world's most beautiful living display inside your house.
Last year we bought a permit from the U.S. Forest Service, drove to Mt. Hood, and hiked in (actually my husband did most of the hiking) to cut down our own tree. I'm not going to lie. It was really cold and challenging to haul the tree back to the car. Still it was worth it. This year we decided to make it easier on ourselves and visited a tree farm.
I have thought about the environmental impact of cutting down real trees for what's essentially frivolous use, but to my relief my favorite holiday tradition isn't so bad. Artificial Christmas trees are made with toxic materials that are not safe for people or the planet. Christmas tree farming is big business in the Oregon where I live and also in states like North Carolina, Michigan and Pennsylvania. I like to support a home state industry when I can. Another way to make Christmas "greener" is to recycle your tree once the holiday is over. Your local waste hauler may have a program or you can check to see if other places have a drop-off program.