Tom Murphy has an ax to grind. He fancies himself a modern day Paul Revere shouting the urgent message "Peak Oil is coming! Peak Oil is coming!". Anything that might lead us to complacency he attempts to debunk. So of course he will slam the possibility of space resources. But his "math" is wrong. See http://hopsblog-hop.blogspot.com/2012/02/in-his-blog-strande...