“ "That may still be plenty" It is not plenty; it is way too much. Even natural gas, the cleanest of the fossil fuels produces too much greenhouse... (read full comment) ” 

Posted on September 5, 2011 at 11:07 PM EDT

“ fusion still causes global warming This piece opens with, "*Fusion is the mythical beast of energy technologies—the one that could solve all of... (read full comment) ” 

Posted on July 30, 2011 at 1:25 PM EDT

“ I'm driving an EV (a Nissan Leaf). Why complain about the batteries when you can go buy a car? Please realize that all new technologies follow an... (read full comment) ” 

Posted on July 7, 2011 at 1:26 PM EDT

“ Yes, you are correct about the H2 RTE, but the RTE of LiIon batteries is actually higher than you suggest. There are many LiIon chemistries (LiCo,... (read full comment) ” 

Posted on August 26, 2010 at 9:50 PM EDT

“ Your comment is filled with false information. Energy density is an important parameter, but is hardly limiting as your post suggests. Compare the... (read full comment) ” 

Posted on November 9, 2009 at 10:27 AM EST

“ the problem isn't that bad The 2002 Toyota RAV4-EV (a battery electric vehicle) has electric heat pump heating and cooling. The effect on range... (read full comment) ” 

Posted on April 12, 2008 at 1:59 AM EDT

+ 4 more comments posted in this discussion

“ there goes the atmosphere Burning methane hydrates is better than burning coal, but doing so will still cause global warming. Worse, if the... (read full comment) ” 

Posted on June 9, 2009 at 1:34 AM EDT

+ 1 more comment posted in this discussion

“ grid planning should take efficiency into account In 2005 the 40 least-efficient states used 13,947 kWh per capita, compared to 8,201 for Japan,... (read full comment) ” 

Posted on July 26, 2009 at 3:33 PM EDT

“ efficiency targets Kevin wrote, "*The company's second prototype was only 10 percent efficient at converting heat into electricity. Its engineers... (read full comment) ” 

Posted on July 8, 2009 at 12:45 PM EDT

+ 1 more comment posted in this discussion

“ yet more greenhouse pollution When you take carbon out of landfill and put it into the atmosphere, you've created a new source of greenhouse... (read full comment) ” 

Posted on May 27, 2009 at 11:09 AM EDT

+ 2 more comments posted in this discussion