Green or not? Test your eco knowledge

POSTED: 09:27 AM PDT Apr 22, 2013    UPDATED: 11:00 PM PDT Apr 21, 2016 

As you celebrate Earth Day 2016, find out if you're living as "green" as you think.

CFL light bulb
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Farrah Zakir/Wikimedia Commons

According to, 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.


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