Can Humans Cause Earthquakes? - Instant Egghead

SUBSCRIBE to our channel: http://goo.gl/aLpxX---We're digging deeper into Earth's crust than we ever have before, pulling water up and pumping it down. As Scientific American editor David Biello explains, these are just a few of the many ways humans are triggering severe seismic activity. ---For our latest videos visit the Scientific American video page http://scientificamerican.com/video.cfm or subscribe via RSS http://rss.sciam.com/sciam/global-videos---Thumbnail image courtesy of Remko Tanis via flickr.com