If you are looking for ways to celebrate the holiday season while being environmentally aware, check your local nursery to see if they offer a "living Christmas tree" program.
In many communities, this is a popular green living way to have a holiday tree and contribute to replanting efforts. A living Christmas tree program usually works by having a young tree delivered to your home for the holiday season. Afterwards, it is picked up and replanted in an area that needs "re-greening". This ends the wasteful practice of cutting down trees for a few weeks of enjoyment, and helps create wind shelter areas, decrease erosion, and beautify the whole area.