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CO2 brings trees to savana's

 
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Location: Verde Valley, AZ.
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Larger leaves from higher co2 allows trees to start invading the grasslands

http://www.sciencedaily.com/releases/2013/05/130531105415.htm
 
Message for you sir! I think it is a tiny ad:
The new kickstarter is now live!
https://www.kickstarter.com/projects/paulwheaton/garden-cards
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