“ One poster wrote, "But also, consider that putting a large number of electric cars on the road will drive up the cost of neodymium and other rare... (read full comment) ” 

Posted on December 17, 2009 at 4:36 PM EST

“ The article makes only limited sense.

It is unlikely that concentrating the sunlight would increase the efficiency of the solar cells, i.e.,... (read full comment) ” 

Posted on May 8, 2008 at 4:03 PM EDT