© Brighteon.com All Rights Reserved. All content posted on this site is commentary or opinion and is protected under Free Speech. Brighteon is not responsible for comments and content uploaded by our users.
Robert Zubrin, PhD speaks at the Doctors for Disaster Preparedness 31st Annual Meeting, July 13, 2013, Houston, Texas. "GDP per-capita increased with total global person years. This is because productivity depends upon technology, which is the cumulative result of human effort."
https://www.planetary.org/profiles/robert-zubrin





