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"How green is your garden? Do you know your R-value from your U-factor? Knowledge is power when it comes to eco-friendly home improvements. Take this quiz to learn more about what it takes to make your home green while saving money."^^<http://www.w3.org/2001/XMLSchema#string>
<http://home.howstuffworks.com/home-improvement/construction/green/green-your-home-quiz2.htm>