A Capella v. 3.0

A Capella v. 3.0


Chris Martenson | capítulos - El Crash Course - capítulos, Crash Course ...

Posted: 27 Dec 2009 07:58 AM PST

Economy, environment and energy are related in a 17-chapter course.

The human footprint

Posted: 27 Dec 2009 07:38 AM PST

National Geographic documentary about the human footprint on Earth. Part 1 out of 10.

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