“ How mirrors can light up the world Mirrors to solve global warming are a good idea, however, down on earth, not up in the sky: Each square metre... (read full comment) ” 

Posted on February 13, 2007 at 1:19 AM EST

“ Mirrors light up the world Each square kilometre of desert receives sunlight equivalent to 1,500,000 barrels of oil annually, corresponding to a... (read full comment) ” 

Posted on January 25, 2007 at 1:41 PM EST

+ 1 more comment posted in this discussion

“ Joe: Electric vehicles alone can’t preserve us from a climate disaster, as long as electricity is produced by burning coal. However, the... (read full comment) ” 

Posted on January 24, 2007 at 12:01 AM EST