Why Do Pennies Turn Green?

Answer

Pennies turn green when their copper content interacts with elements in their environment, including the carbon dioxide in the air. Copper and carbon dioxide combine to form a compound called copper carbonate and this greenish substance is often called verdigris.
Q&A Related to "Why Do Pennies Turn Green"
The pennies turn green because they are open to the air, because they contain copper, and because copper turns green when oxidized.
http://wiki.answers.com/Q/Why_do_pennies_turn_gree...
Yellowing vines in a leaf. All leaves or needles on a plant, evergreen or not, will eventually grow old and fall off. If you notice a few leaves here and there turning light green
http://www.ehow.com/facts_6187961_do-plants-turn-l...
Essentially what happens is that the copper in the penny reacts with the oxygen in the
http://www.chacha.com/question/how-do-you-turn-a-p...
This is called. Chlorosis. and it means the green chlorophyll is not present. All you are seeing is the other leaf pigments that are normally not noticable because they are masked
http://www.quora.com/Gardening/Why-do-the-leaves-o...
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