An interesting article in scientific american about what would happen to our earth that is in present condition. if we humans do not exist.
Go ahead and read this if you want to know what all things we humans have done to the nature and environment....
http://sciam.com/article.cfm?chanID=sa006&colID=1&articleID=2691D716-E7F2-99DF-38F54EF6075AAB4D
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