“ So is battery technology advancing faster than fuel cell technology? Have there there been more battery inventions and breakthroughs? (read full comment) ” 

Posted on March 3, 2008 at 5:33 PM EST

“ ??? How much gasoline is left in the world? With ever-growing global consumption rates, we will need a substitute soon. Coal-fired power plants... (read full comment) ” 

Posted on March 29, 2007 at 6:05 AM EDT