As you celebrate Earth Day 2014, find out if you're living as "green" as you think.
According to houselogic.com, CFL bulbs are about 75 percent more efficient than old light bulbs, but they don't do well in enclosed fixtures and must be disposed of carefully because they contain mercury. Try LED light bulbs instead.
iStock / gbh007
National Portrait Gallery, London
iStock / mashabuba
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