cicerone imposter wrote:Cyclo, Do you have a source for that claim?
Hmm, well, left off a zero or two. Damn scientific american!
Here's a popular map of the subject
According to this map, we'd need somewhere around 300k square miles at 8% efficiency, if we put them at the best possible spots. Current solar cells run somewhere closer to 20% efficiency, so let's chop that number in half, and say 150k square miles.
Now, will that all be in the desert? A lot of it will, but inventions such as solar shingles, solar windows, and other methods of generating energy on the spot will help spread the load out further. I also look to increases in battery and capacitance technology to help.
If we can double our efficiencies up to 40% (something which looks increasingly possible as new technology is introduced) then the numbers drop even further.
Cycloptichorn