Green or not? Test your eco knowledge

Published On: Apr 22 2013 09:27:50 AM PDT   Updated On: Apr 22 2014 07:18:29 AM PDT

As you celebrate Earth Day 2014, find out if you're living as "green" as you think.

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White-colored roofs, which are common in some tropical nations, can cut your cooling costs by up to 20 percent if you live in a warm climate -- roughly south of Columbus, Ohio. But be sure it won't break any homeowner association rules first, as some have strict guidelines on aesthetics.

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