Why Bernie CO2
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Another Why Bernie Paper Weight. Print One And See What Conversations It Sparks! The Graph Is Of The Keeling Curve Of Co2 Levels In The Atmosphere. See Http://En.Wikipedia.Org/Wiki/Keeling_Curve For More Information. The Sketchup Model Includes A More Complicated Model Which I Was Unable To Print With Two Tries. It Should Print But My Makerbot Wouldn'T Do It.
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