"Lec 22 - Does Biochar Deliver Carbon-Negative Energy?" (May 19, 2010) Johannes Lehmann, Associate Professor of soil biogeochemistry at Cornell University, discusses the characteristics of naturally occurring terra preta including its agricultural and carbon sequestering benefits and then turns to considering the factors involved with implementation industrial biochar systems for large-scale carbon sequestration and energy provision. Stanford University http://www.stanford.edu Biogeochemistry at Cornell University http://www.biogeo.cornell.edu/ Stanford Energy Seminar http://energyseminar.stanford.edu Stanford University Channel on YouTube http://www.youtube.com/stanford
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