Nothing says "Christmas" like the smell of pine in your living room on a winter morning! But is that smell really "green" or is it bad for the planet? Is it more environmentally responsible to buy a fake tree and use it year after year? What about keeping a live tree for Christmas? Let's look at the options one by one.

If you want a tree for the holiday, the experts at Grist and TreeHugger say it's actually better to buy a cut real Christmas tree than an artificial tree.

Why? In a word, plastics. Fake trees are made of polyvinyl chloride (PVC). Producing this type of plastic creates a lot of pollution, and PVC is difficult to recycle.

Farmed Christmas trees are ultimately a renewable resource. Growing trees absorb carbon dioxide, and after the holidays, the trees can be recycled into mulch. Check Earth 911 to see where to take your dead tree after the 25th.