Luckily, there are Christmas tree farms, like Yule Tree Farms and Krueger's Christmas Trees, which sustainable travel writer Jennifer Stewart mentioned earlier this month. However, Christmas tree farms ship a high percentage of their trees, and it's better to get a tree off-the-farm, if possible.

Sustainable travel to Boulder always supplies endless possibilities, including possibilities for Christmas trees.

Cruises have just begun to climb aboard on the sustainable travel train, but they are still (usually) much, much dirtier than trains, cars and planes. Of course, cruises aren't even the main problem; tankers, cargo ships and other sea monsters are the ones dirtying up the sea.

Green travel means green everything-we-can: transportation, luggage, food, traction… Yes, traction. Believe or not, there is a traction agent on the market that is 100% green. Green in color and green for the world: it actually actively helps the environment.