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July 25, 2014
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It is estimated that between 600 and 670 million CFLs end up in U.S. landfills each year, releasing two to four tons of mercury into the atmosphere, almost half the amount emitted by coal-fired power plants. Popular Mechanics crunched the numbers (popularmechanics.com/home/reviews/news/4217864) and concludes that, despite those figures, CFLs still contribute less to mercury emissions than ICs in their over-all life cycle.

Not very encouraging, considering the impacts of mercury pollution on our air, water and food. Nevertheless, Congress passed legislation that will phase out IC bulbs completely by 2014, except for certain high and low wattage bulbs.