Are real or fake Christmas trees better for the planet?

If the surge in sales of artificial trees at John Lewis and other stores signals an attempt by consumers to go green, then they should perhaps think again. With 8m real trees in the process of being purchased this Christmas, the idea of saving one from the axe might be prompting the move to fake ones this year in the belief that they are more environmentally friendly.
 But environmentalists and energy analysts would disagree.
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