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Now that Thanksgiving is over, it's time for some of us to start hanging those beautiful energy-wasting holiday lights. Before you rush out to string those cheap incandescent bulbs, think about replacing them with lightemitting diode (LED) strings. While these decorative lights require more up-front cost, they use up to 95 percent less electricity (less carbon emissions!), last up to 10 times longer and are less of a fire-hazard since they produce very little heat. So, ponder that before you start to create your own winter wonderland.

There's only three weeks left in The Slate Green Challenge, but it's not too late to join the 27,876 readers who have pledged to collectively reduce their CO2 emissions. It all starts with a carbon footprint quiz and follows with articles and how-to's on reducing your impact on the Earth with topics such as transportation, food and water consumption, and this week's edition on the holidays. If you are one of the first 500 speedy contestants to finish the challenge, our sponsors at I'm Organic will style you out with a new t-shirt. ::Slate Green Challenge Welcome ::Slate Green Challenge Week 6: Holidays