Ramez Naan has an interesting guest blog up at Scientific American.
He argues that the price per solar watt has been dropping every 9 years for the past few decades. Whether this trend continues remains to be seen, but I found the article to be timely and hopeful in the midst of uncertainty about the future of nuclear power.
While human beings are not capturing useful solar energy, the Earth may be capturing extra solar energy through the mechanisms of “global warming”. “useful” is the key concept.