Customer Review

Reviewed in the United States on August 23, 2013
This should be taught in 8th grade science class but the individual pieces are never assembled for us until now. I didn't realize that all the extra carbon in the air belonged in the ground and that photosynthesis is the opposite process of oxidation. That is why sustainable farming practices help to solve all the environmental issues at the same time. It's all about the soil which really makes sense now that someone showed me the light.
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4.7 out of 5 stars
4.7 out of 5
101 customer ratings