QUIZ: Earth Day history and facts

Friday, April 20, 2012 | 2:51 p.m. CDT; updated 5:23 p.m. CDT, Saturday, April 21, 2012

Test your knowledge of Earth Day here. After each question, select "View Answer" to learn more about the correct answers. Then check out your carbon footprint on the Earth Day Network's site.

If you have Earth Day photos, or will take any this weekend, please share them with us! We'd love to include them in our Earth Day Facebook album. You can share by:

Information from the Mother Nature Network and Earth Day Network.

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