“ Why sugar vs. petroleum? This "electrodialysis" technology could be useful regardless of whether the energy source for the bacteria is sugars or... (read full comment) ” 

Posted on October 11, 2010 at 12:43 PM EDT

“ Why corn sugar vs. petroleum? Why do we want to make plastics from corn sugar vs. petroleum? Why would we want to drive up the price of food when... (read full comment) ” 

Posted on October 11, 2010 at 12:36 PM EDT

“ Will there be a second plant? From what i've seen, China isn't duplicating the direct coal liquifaction process. While the plant in the Shenhua... (read full comment) ” 

Posted on September 8, 2010 at 11:39 PM EDT

“ I don't think that converting natural gas to natural gas hydrates for shipping purposes is cheaper than shipping it as LNG. We should be focusing... (read full comment) ” 

Posted on September 8, 2010 at 11:28 PM EDT

“ What's the price of pollution? So "clean energy" (wind, solar, biodiesel, etc.) can't compete right now because it's more expensive than the... (read full comment) ” 

Posted on August 31, 2010 at 4:20 PM EDT

“ Mathematical definition of P & NP What's the mathematical definition of P & NP? The article was very qualitative about the definition. (read full comment) ” 

Posted on August 19, 2010 at 10:33 AM EDT

“ If we're talking about access to Lower Earth Orbit, then nuclear propulsion is not an option. To get cheap access to space, we need to develop... (read full comment) ” 

Posted on July 31, 2010 at 8:20 PM EDT

“ Not comparing apples with apples It's clear that this report is not comparing apples with apples. So what if the oil industry gets $600 billion... (read full comment) ” 

Posted on July 31, 2010 at 5:11 PM EDT

“ Win-Win Situation Perhaps there is still a chance to look for win-win situations. Right now, the cap&trade bill is seen as a lose-lose because of... (read full comment) ” 

Posted on July 25, 2010 at 7:24 PM EDT

“ Lukewarm response to bill This bill has some strange aspects (such as paying the people with the money made on cap&trade), but also some typical... (read full comment) ” 

Posted on May 13, 2010 at 8:29 AM EDT