A friend was telling me about an article in The Observer (I've googled and can't find it, unfortunately). The gist of it was that real trees are actually more environmentally friendly/PC than fake ones. Real ones only take 2 years to grow, making them easily sustainable (almost recyclable!). And they take in carbon dioxide and give out oxygen. Fake ones are made using non-environmentally friendly plastics and chemicals - all of which create pollution in their manufacture. Plus, they are often made in sweatshops in the third world, by an underpaid and exploited workforce. The article concluded that even if you bought one artificial tree and used it for a lifetime, it would still have caused more damage to the environment than if you bought a real one every year!
Wish I could find the article - would show it to dh 