A full moon appears through the blue glow of the Earth's atmosphere, in this photo taken aboard the Space Shuttle Discovery in 1999. (NASA/Reuters/File)
A lot of people have opinions about climate change, but do they really know what they are talking about? Test your knowledge with this quiz.
http://www.csmonitor.com/Environment/2011/0422/Earth-Day-How-much-d...
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i was surprised at how severe the problem actually is.....but facts and numbers don't lie...
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