Documentary of Terra Preta

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Documentary of Terra Preta

Postby George Collins » Mon May 19, 2014 11:37 am

Fascinating documentary on terra preta, the charcoal enrished soils of the Amazon basin that is theorized to be the source of fertility upon which vast, pre-Columbian civilizations were built.

http://topdocumentaryfilms.com/secret-el-dorado/
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George Collins
 
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