Christmas trees are grown as a crop, specifically for, well, Christmas. They aren't chopped down unnecessarily, they wouldn't be there if they went going to be cut down.
I'm surprised you don't know anyone with a real tree, I've got one friend with a beautiful fake I've, but everyone else I know has a real one. Understand about the expense, but not your comment about the environment. A locally grown real tree is better for the environment than a fake one.